Warranty & Service Information

IMPORTANT: Changes to Return Shipping Policy beginning on January 1, 2019

Zero Tolerance provides free lifetime sharpening of your ZT knife, free repair service, and these free replacement parts*:

  • Handle screws
  • Standard pocketclips
  • Pocketclip screws
  • Torsion bar (for SpeedSafe® assisted opening knives)
  • KVT ball bearings
  • Washers

However, due to increasing costs, we will begin charging a flat $7 Return Shipping & Processing Fee as of January 1, 2019. Thank you for understanding this necessary change to our policy. (*You can also purchase specialty replacement parts for your ZT. See details below.)


Zero Tolerance products are backed by a Limited Warranty against manufacturing defects. In addition to supporting our products with this warranty, we will be happy to sharpen your Zero Tolerance knife for free when you send it in for warranty service. If you have questions about your warranty or how to take advantage of it, please check our FAQs to see whether your question has already been answered. If not, email our Warranty Team  for more information.


In addition to the free replacement parts listed above, we can also replace other parts for a small fee. For instance, if you accidentally broke your ZT folder's blade, we can replace it for you for $30. Please see FAQ under "Warranty Questions" for more information on blade replacement. To find out which other paid replacement parts are available for current ZT models, click on "Available ZT Parts" under General Information.

Warranty/Service Form

General Information

  • Limited Lifetime Warranty

    Zero Tolerance knives from Kai USA Ltd. carry a limited warranty for the lifetime of the original owner, except when stated otherwise. We guarantee our knives against manufacturing defects in material and construction and to perform as advertised when properly used and maintained. The Limited Lifetime Warranty is non-transferable and does not extend to normal signs of wear, rust, damage, or breakage due to improper use, improper maintenance, accidents, loss, or theft. This warranty is void on products that have been modified in any way. Any product we determine to be defective will be repaired or replaced solely at our discretion. To receive warranty repair or replacement, the owner must send the product to be evaluated by Kai USA Warranty Services in our Tualatin, Oregon headquarters. In addition to the provisions of this warranty, the owner may also have other rights that can vary by state. The Limited Lifetime Warranty does not apply to the TX Tool, Fire Starter, or Kershaw Knife Oil. No other warranties are implied or expressed other than what is specifically stated here. Kai USA Ltd. reserves the right to determine what constitutes normal wear, improper use/maintenance, and modification.

    We reserve the right to make changes to this warranty at our discretion and without notice.

  • Liability Disclaimer

    Zero Tolerance knives are intended and sold for legitimate sporting and professional purposes only. The purchase, use, and ownership of knives are subject to a wide variety of federal, state, and local laws and regulations. Always comply with all laws and regulations in effect in your area. Due to the complexity and constantly changing nature of these laws and regulations, it is the responsibility of the buyer to investigate and comply with the laws and regulations that apply in his or her specific area. You, and not Kai USA Ltd., are solely responsible for any claims resulting from violation of these laws and/or regulations.

  • Warning!

    Knives are extremely sharp tools and should only be used or handled with the utmost care and caution. Any use other than cutting (such as prying or twisting) is considered misuse and abuse—and will void your warranty. Zero Tolerance Knives/Kai USA Ltd. is not responsible for any injuries resulting from misuse or abuse of the product.

    Do not use any ZT knife as a throwing knife or a stabbing device. Throwing knives and knives developed for stabbing have a distinctly different design and function. ZT knives are not intended for throwing or stabbing; they are designed for cutting purposes only.

  • Replacement Vouchers

    There may be cases when a ZT knife has been evaluated and is eligible for warranty service, but may not be able to be repaired or replaced. This can be true with discontinued models for which we may no longer have parts or stock. In such cases, at our discretion, we will issue a voucher for the original Manufacturer’s Suggested Retail Price. The voucher value can then be applied to the purchase of a current-model ZT—directly from us. If you prefer to have your original knife returned instead of using the voucher, please call our warranty team toll-free: 1-800-325-2891. (We will retain the knife for 30 days from the date the voucher is issued. If you do not call us to let us know by then, the knife will be recycled.)

  • Counterfeit Knives

    Counterfeit knives are a huge problem in our industry. If you send a counterfeit ZT in for warranty service, we will not service it and we cannot return it to you. Please help us fight this scourge by purchasing only from authorized Zero Tolerance dealers.

  • Available ZT Parts

    If available, Zero Tolerance will replace the following parts for FREE: • Handle screws • Standard pocketclips • Pocketclip screws • Torsion bars (for SpeedSafe assisted opening knives) • KVT ball bearings • Washers

    However, many ZTs have premium parts that are more costly to manufacture and we must charge a fee for those replacement parts. Here are the parts for which there is a fee:

    • Pivot set—$15
    • Spacer—$15

    • Pivot set—$25
    • Spacer—$15
    • Clip—$15
    • SLT hidden flipper tab—$15

    • Pivot set—$10
    • Spacer—$8

    • Pivot set—$10
    • Spacer—$15
    • ZT logo medallion—$8

    0393 / 0393GLCF
    • Spacer—$8
    • Filler tab—$8

    0450 / 0450CF
    • Pivot set—$10
    • Spacer set—$5

    • Pivot set—$10
    • Spacer set—$8

    • Pivot set—$10
    • Spacer—$15
    • Clip—$10

    0460 / 0460TI
    • Pivot set—$10
    • Spacer—$10

    • Pivot set—$10
    • Spacer—$8
    • Clip—$10

    • Pivot set—$10
    • Spacer—$15
    • Clip—$15

    0562 / 0562CF / 0562TI
    • Pivot set—$10
    • Spacer—$8

    • Pivot set—$10
    • Spacer—$8

    • Clip—$15

    • Spacer—$15

    0801 / 0801TI / 0801BW
    • Pivot set—$10

    • Pivot set—$15
    • Spacer—$15
    • Clip—$25

    • Pivot set—$10
    • Spacer—$25

    • Pivot set—$15
    • Spacer—$20
    • Clip—$20
    • Custom thumb stud—$15

    • Pivot set—$10
    • Spacer—$8

    • Pivot set—$25
    • Spacer set—$10
    • Clip—$15

Process a Warranty Claim

If you believe your product may have a problem in its original material or craftsmanship, please send it in for evaluation. Complete the online form at the “Warranty/Service Form” link above. Once you have submitted the form, you will receive an email with a PDF of the form. Download it to your desktop, open it in Adobe Acrobat, print it out, and include the form with your shipment. Be sure to save the PDF for your records.

Shipping & Packing Information

  • How to Ship Your ZT for Service

    To send in a ZT product for evaluation and/or warranty service, including repair and sharpening, please read all the information on this page.

    Click "Warranty/Service Form" above, fill out the form completely, then submit it. You will receive an email with a PDF of the form. Print a copy to include with the items you are sending for warranty service. Keep the PDF or another copy of the form for your records.

    Package the items safely. Please use a box; envelopes are not recommended.

    Ship via a carrier with a tracking service. Please use UPS, Fed-Ex, US Express Mail, or another carrier with tracking. There must be a way to track your package through your carrier. Kai USA Ltd. cannot be responsible for your item/s unless we have confirmation that your package was delivered to us.

    Please allow up to six weeks for processing, including delivery time. 

    IMPORTANT: We are not responsible for damage to or loss of items that are not properly packaged and shipped.

  • Packaging Information & Tips

    Some of the packages that show up in our Warranty Department for service are frightening. There are packages with blade tips that have pierced the cardboard box and are lying in wait for the next person who picks them up. There are boxes with great jumbles of knives just rattling around in them, cutting into each other. With just a little care, this doesn't have to happen to your package. Remember that even a dull knife can be dangerous and follow these easy tips for safe packing:





    Tip #1: Sheath or wrap fixed-blade knives and kitchen knives—If the knife has a sheath, place it in its sheath. If not, wrap it in several layers of newspaper or bubble wrap, making sure to fully cover the tip. If you are returning more than one knife, wrap each knife individually, and then wrap them all together so that they won't roll around in the box, possibly causing damage to the blades or handles.

    Tip #2: Make sure folding knives are closed, then wrap the closed knife in several layers of newspaper or bubble wrap. If you wish to keep your original box, please do not send it in with your warranty shipment. All boxes sent in with warranty shipments will be recycled.

    Tip #3: Fill your box with packing material—such as packing peanuts, bubble wrap, or newspaper. Place a layer of packing material in the bottom of your shipping box. Then place the knives on top of the filler and, finally, add another layer of filler on top of the knives.

    Tip #4: Include a copy of your completed Warranty/Service Form (and keep a copy for yourself). Then close and tape your box according to shipper recommendations.

  • Shipping Internationally


    You must include our Warranty/Service Form (inside the package) AND the appropriate Customs Declaration Form required by US Customs and Border Protection (on the outside of the package). Your carrier will help you decide on the correct forms. For Canada Post, for example, you will need form CN22 or CN23.

    To avoid unnecessary duty charges, under "Quantity and detailed description of contents" on the form, write the number of knives you are sending and note the description as "warranty service."

    Mislabeled or misdeclared shipments can cause extended delays through customs. If you have any questions, contact our Warranty Service Team and they’ll be happy to help.

    We reserve the right to refuse any package or to charge you—the sender—for any duties incurred by us for wrongly declared or undeclared packages shipped to our Warranty Department.


    To make receiving warranty service for your Zero Tolerance products simpler, please return them to the authorized retailer from whom you originally purchased them. Do not send them back to Kai USA. Only an authorized retailer will be able to support your warranty service. To ensure that you’re purchasing from an authorized retailer, please check our list of authorized distributors and dealers here. If a distributor is listed for your area, contact them to make sure the retailer you would like to purchase from is fully authorized. Thank you for supporting our authorized retailers.

  • Shipping Address


    Kai USA Ltd.
    Zero Tolerance Warranty Dept.
    18600 SW Teton Avenue
    Tualatin, OR 97062

Warranty Information for Our Other Brands

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