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, just contact our Warranty Service Team and they’ll be happy to help.
Accidentally broke your ZT folder's blade? We can replace it for you for $30. Please see FAQ under Warranty Questions for complete information. We can replace other ZT parts like clip, pivot, or spacer. For the current part pricing please see here.
Special information about automatic knives
Due to state and federal regulations, automatic knives must be returned for warranty service via an authorized dealer or military/law enforcement procurement office. Once the knife has been serviced, we will ship it back to the dealer or officer who originally sent it to us. You will receive the serviced knife from them. If you are a member of law enforcement or the military, you may directly ship your automatic knife to us for warranty service and we can return it directly to you. (Download the Automatic Knives Release Form at the link below for additional details.)
If you have any questions, please contact us at 1-800-325-2891 or by email. If you are an authorized dealer, military/law enforcement procurement officer, or a member of the military or law enforcement, you can download the required Automatic Knives Release Form here.
Limited Lifetime Warranty
Zero Tolerance 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. 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.
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.)
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.
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.
Please ship to:
KAI USA LTD., Kershaw Knives
18600 SW Teton Avenue, Tualatin, Oregon 97062
How to Receive Zero Tolerance Sharpening & Warranty/Repair Service
- To send in a Zero Tolerance product for evaluation and/or warranty service, including repair and sharpening, please complete the warranty form. Click Process a Warranty Claim on the upper left, then click Download Warranty Form.
- Fill out this form completely, then print two copies. Include one with the items you are sending for warranty service; keep one 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. We will contact you if there will be any delay.
IMPORTANT: We cannot be responsible for damage to or loss of items that are not properly packaged and shipped.Learn about safe packing tips
When shipping from anywhere outside the United States, 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 form to use. 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. We encourage all international customers to contact us via email prior to sending any items in for service. We can help make sure you have correct codes and values to make shipping as speedy as possible.
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.