Master your questions here

Explore these FAQs first, then if you still have a question, we'd be happy to help.

General Questions

  • How do I become a dealer?

    Just click on the “Dealers” link at the bottom of this page. There you will find information for contacting a representative in your area who will be happy to speak with you about becoming an authorized Zero Tolerance dealer. Please call or email so that we can answer any questions you may have.

  • Do you have an outlet store?

    No, ZT does not have an outlet store. However, if you live in the Portland, Oregon area, we do have a once-a-year Warehouse Sale (usually just after Thanksgiving). Look for our ads in local Portland-area media and for information online including this website and our Facebook pages.

  • Looking for a local ZT dealer?

    Search for a dealer near you through our Dealer Locator.

    You can also shop online at other authorized Zero Tolerance dealer sites; many of our dealers also sell our products through their websites. In addition, there are reputable dealers who only sell online. We urge you to take care in choosing an online-only dealer and do your homework to ensure you are purchasing from a reliable dealer. 

    No matter where you purchase, either through this website or through one of our authorized dealers, be assured that every Zero Tolerance product is backed by our Limited Lifetime Warranty (except the factory seconds sold at our Warehouse Sale).   

  • How can I get a catalog? How much do they cost?

    We’d be happy to send you a FREE ZT catalog. Contact us with your request; be sure to include your mailing address so we know where to send it. You can view all of our current products online in the knife gallery. Or download a PDF of our current catalog.

  • What if there’s no ZT dealer in my area listed on your site? Where else can I purchase ZT knives?

    While Zero Tolerance products are mainly available through our network of excellent dealers, as of late 2012, ZT products also became available through this ecommerce website. This website provides a place where you can learn more about Zero Tolerance products, stay up-to-date on ZT news, and conveniently purchase Kai USA Ltd. products, including Zero Tolerance, Kershaw, Shun, and Kai brand products. Orders placed through this website are fulfilled by dealers in our network at MSRP (Manufacturer’s Suggested Retail Price). We do this to support the many retailers who carry our quality products. If our network cannot fulfill your order, it will come to us and we will fulfill it with available product.

    If you would like to be able to see our products in person before purchasing, we urge you to visit one of our dealers. Not only will you be able to hold the knives in your hand, you’re also likely to get a better price from one of our dealers. If you don’t see a nearby Zero Tolerance dealer listed on our site, please contact us. We may know of an authorized dealer in your area who has not yet been listed on the website.

Product Questions

  • Is there a different style of pocketclip that will fit my knife?

    We're sorry, but the only style of pocketclip that will fit your knife is the pocketclip that was on it when you purchased it. We can replace your pocketclip, but it will be with the same style that was originally on it.

  • Will you modify my knife?

    Sorry, no; ZT cannot modify your knife. Modifying your knife voids your warranty.

  • Will the coating on the blade of my knife wear off?

    The technologically advanced coatings on the blades of ZT knives are designed to provide a non-reflective finish and to enhance specific performance features. Although these coatings are designed to stand up to continual knife use, in time, all coatings will show some wear. Scratches and other signs of wear should be expected and considered normal.

  • Where are your knives made?

    Zero Tolerance knives are proudly made in the United States of America.

  • How do I measure blade length?

    When ZT measures blade length, we abide by the protocols of the American Knife & Tool Institute (AKTI), of which we are members. The AKTI defines knife blade length as “the straight line extending from the tip of the blade to the forward-most aspect of the hilt or handle.” Given the variation in blade and handle shapes, this is a very useful and reasonable standard for blade measurement.

  • What do the 4 Xs on my blade mean?

    If the blade of your ZT knife has etched “Xs” on it, the knife was originally purchased at our annual Warehouse Sale as a factory “second.” In other words, the knife is not “first” or top quality. These knives usually look and work just fine; they are simply not up to ZT’s demanding standards. As a result, these factory seconds do not carry the ZT Limited Lifetime Warranty.

  • Do you make left-handed knives?

    A number of our ZT knives feature ambidextrous opening. All ZT SpeedSafe® knives, for example, can be opened by pulling back on a blade protrusion with the index finger of either the left or right hand. These knives combine ambidextrous opening with a frame lock or locking liner that many lefties find is easy-to-operate with just a little practice.

  • How thick are ZT blades?

    The blade thickness of our knives varies according to style of the knife. Generally, ZT blades range from .121 inches (.307 cm) to .190 inches (.48 cm). Most are .156 inches (.40 cm) thick. These somewhat thicker blades are built to stand up to the demanding tasks for which our customers use them.

  • How can I find out about new products?

    We update this website with our new products as they become available so you’ll always have online access to information about our latest products. You can also find new products by selecting “New” in the product shopping filters.

SpeedSafe® Questions

  • How safe is SpeedSafe®?

    Very. SpeedSafe® opens when the user overcomes the resistance of the torsion bar. Once deployed, a locking system secures the blade in position so that it does not close accidentally. When releasing the lock, the blade won't snap shut due to resistance provided by the torsion bar. Since the torsion bar provides a bias towards the closed position, it will normally hold the blade securely closed. New SpeedSafe® users can ensure safe use of the technology by practicing to proficiency.

  • How long does the SpeedSafe® torsion bar last?

    We test our torsion bar to 10,000 openings. However, at some point, the torsion bar may need to be replaced. We will gladly do this at our facility free of charge. See Warranty at the bottom of this page for information on this service.

  • Who are our SpeedSafe® customers?

    SpeedSafe® was specifically designed for sporting and work situations where one-handed opening is preferable and safer. Its safe, efficient opening has made it a popular choice for hunters, fishermen, and those who require the one-hand opening function on the job-site.

  • Is a SpeedSafe® knife a switchblade?

    NO! There are many unique features of SpeedSafe® knives that make them quite different than knives that are considered switchblades. Unlike a switchblade, SpeedSafe® blades DO NOT deploy with the push of a button in the handle or by gravity alone. Instead, the user must overcome the torsion bar's resistance in order to engage the SpeedSafe® system. Because of this, SpeedSafe® knives fall fully outside the Federal definition of a switchblade. However, due to the complexity and constantly changing nature of these laws and regulations, it is impossible for Kershaw Knives to be aware of every restriction in every location in which our knives are sold or carried. It is the responsibility of the buyer to investigate and comply with the laws and regulations that apply in his or her specific area.

  • How does SpeedSafe® work?

    The heart of SpeedSafe® is its torsion bar. Closed, the torsion bar helps prevent the knife from being opened by "gravity;" it creates a bias toward the closed position. To open the knife, the user applies manual pressure to the thumb stud or blade protrusion to overcome the resistance of the torsion bar. After the blade is out of the handle, the torsion bar moves along its half-moon track and takes over. The blade opens smoothly and locks into position, ready for use.

  • What is SpeedSafe®?

    SpeedSafe® is a patented system that assists the user to smoothly open any SpeedSafe® knife with a manual push on the blade's thumb stud or pull back on the blade protrusion. SpeedSafe® is built into many of Kershaw's best-selling knives.

Use & Care Questions

  • What’s the best way to carry a ZT knife in my pocket?

    All ZT folding knives feature a pocket clip. To ensure the knife remains closed until you open it, put the knife inside your pocket with the clip to the outside. The blade side of the knife should be snugged up against the seam of the pocket. A tight clip, combined with placement against a seam will help ensure your knife does not open accidentally during carrying.

    Many ZT folding knives come pre-drilled for a variety of carry options. The safe pocket carry positions for these various options should always snug the blade toward the seam of the pocket.

    Options include:

    1. Tip down, rear right pocket

    2. Tip up, rear left pocket

    3. Tip down, front left pocket

    4. Tip up, front right pocket


    DO NOT clip the knife to the outside of your pocket

    DO NOT clip the knife to your belt

    Fixed blade knives, of course, should be carried only in their sheath.

  • To what angle should I sharpen my ZT blade?

    Zero Tolerance blades are sharpened to angles of between 20° and 22°.

  • What’s the best way to sharpen my Zero Tolerance knife?

    The easiest and surest way to make sure your knife stays sharp is to send it back to us for free sharpening when the knife becomes dull. Just pay for shipping it to our Tualatin, Oregon facility. We’ll sharpen and return it at no charge to you. We will be happy to sharpen your knife for free for as long as you own the knife. For more information on this service, see the Warranty Questions.

    If you wish to sharpen your knife yourself, we can recommend the Kershaw Ultra-Tek sharpener. You can also successfully sharpen your knife on a whetstone or other specialty sharpeners.

  • What’s the best way to clean and maintain my knife?

    Just wipe your knife down to remove surface dust and debris. If the knife is very dirty, wash it with soap and water, dry thoroughly, then oil it. Wiping a light coating of oil on the blade and hinge before storage is also important for keeping your investment in proper working order. Oils such as WD40, 3-in-1 oil, or gun oil will work fine for maintaining your ZT

  • What tools do I need to adjust my knife?

    ZT knives features a 3/8-inch hex head pivot shaft nut that can be adjusted using standard field tools such as pliers or an adjustable wrench. The ZT JB2 Shroud Cutter also has a built-in tank wrench that will fit the ZT pivot shaft nut.

Warranty Questions

  • I accidentally broke my knife blade. Can you replace it?

    Accidents happen. If you accidentally broke your Zero Tolerance folding knife's blade, we have good news. We can replace your knife's blade for you, returning it to good working order for just $30. Simply send your knife in according to warranty instructions. We'll replace the blade for you and return the knife. Please note that we cannot replace fixed blade knives. Knives with XXXX on their blades are factory seconds and are not eligible for repair or replacement. We also cannot replace blades for discontinued knives or limited-edition knives. Also note that replacement blades may or may not have the laser blade etching; in other words, a replacement blade may be entirely blank. Nevertheless, it is a genuine ZT blade. ZT blades that have broken due to a manufacturing defect will be replaced under warranty, free of charge, as always.

  • Can I send my knife back to you for routine sharpening?

    Yes, we will happily sharpen any Zero Tolerance knife for you. There is no cost for this service, aside from that of initially shipping the knife to our facility.

  • How will I know if my knife is covered under warranty?

    Please provide your phone number and/or email address on your Warranty Service Form. If there is any problem with your coverage, we will call you to discuss your knife. Otherwise, we will repair your knife within our usual turnaround time.

  • Will you sharpen my knife?

    Yes, we sharpen every Zero Tolerance knife sent in for warranty service as part of our normal procedure. (In fact, we will sharpen your ZT knife even if it doesn’t need warranty service. Please see below.) We provide this additional service free of charge. Please note that we can only sharpen and repair Zero Tolerance knives.

  • I shipped my knife to you for repair. Have you received it yet?

    We encourage you to ship via UPS or Fed-Ex as these companies automatically provide a tracking number. The tracking number allows you to easily verify your knife's arrival at our facility. If you prefer mailing the knife to us via the US Post Office, we suggest shipping via Express Mail® because this service also provides you with a tracking number for verification of the arrival of the package. (No other Post Office services offer step-by-step tracking.) Please note that ZT will not notify you of the arrival of your knife at our facility; having a tracking number from your carrier will enable you to check with your carrier to ensure your package’s arrival.

  • Can I have a part sent to me?

    We can send you screws, pocketclips, torsion bars, pivot bolt and screws, and handle screws. We cannot send blades, handle scales, liners, etc. If you need a blade, more than one part, or parts other than those we can ship, please send your knife in for warranty service. If you want us to ship you screws, a pocketclip, a torsion bar, pivot bolts and screws, or handle screws, please use the Contact Us form on the bottom of this page to request parts. Remember that parts are specific to each knife model, so please make sure the model number is included in your request for parts. You can locate the four-digit model number (for example, 0350) on the blade.

  • Where do I ship my knife for warranty service?

    Please send your knives to Kai USA Ltd. You will need to complete our online Warranty Service Form, print out a copy, and include it with your package. The information you need can be found here.

  • Can I ship my knife in a padded envelope?

    Please use a box. Padded envelopes are often ripped or torn open during the shipping process and your knife could be lost. We cannot be responsible for knives lost during shipping. You will find safe packing tips here.

  • Can I have my old knife back if you choose to replace it?

    We're sorry, but we cannot replace a knife and return the old one.

Shopping Online

  • How is sales tax calculated?

    Taxes will be applied to your order if it is delivered from the same state or province as your shipping address. Some areas require tax to be assessed on shipping and handling charges. Since we don't know the fulfillment location until after you place your order, your checkout screen and order confirmation email may not include taxes.

  • How is shipping calculated?

    We currently ship only to the United States and Canada. Shipping is a flat rate of $7, no matter how many knives you order. Some states and provinces require taxes to be applied to shipping and handling fees, so the final shipping charges will be shown at checkout.

  • What is Shopatron?

    Kai USA is pleased to partner with Shopatron, a shopping service designed to make it easy for you to shop online and get the products you want promptly. The Shopatron network allows you to order products online directly from a manufacturer's website, making online shopping more convenient. When you shop at an online store with Shopatron, you are guaranteed to receive authentic merchandise from an authorized retailer. Shopatron also allows you to access the entire product line of the brand on one convenient site.

  • When will I receive my order?

    This online store was created to provide a convenient, efficient, and reliable way for our customers to purchase our quality knives online. When your order is taken online, it is matched with the nearest authorized retailer with the items in stock and shipped within two business days. This system supports local retailers while providing you with excellent customer service and prompt shipping; most orders arrive within 3-5 business days.

  • Which payment methods do you accept?

    You can pay with Visa, MasterCard, American Express, Discover, PayPal or Bill Me Later (US only).

  • How do I cancel my order?

    You may cancel your order at any time. Just login to your online account or phone the Shopatron customer service team.

  • How do I access my order history?

    Create an account as part of the checkout process and you can login to your account anytime to check order history and status. You may also login as a guest and check status using the order number you receive in our confirmation email.

  • How do I return my order?

    Use our hassle-free 30-Day Money-Back Guarantee. Just login to your account and the Shopatron customer service team will email instructions.

  • How long do I have to return my order?

    You have up to 30 days to return your item if you are not delighted with your order.