TOPTUL Professional Tools, unless otherwise specified, are unconditionally guaranteed against defects in materials and workmanship for the life of the tool. We will repair or replace any tool that fails to give satisfactory service, on the condition that the tool has not been abused or modified and that it is returned to an authorized warranty TOPTUL dealer. You can count on TOPTUL to stand behind our top quality professional hand tools. Altered TOPTUL products: For instance, thin out certain facet of products purposely to increase the operating space. The altered, thin open-end of wrench allows users to work in a confined area but easily resulted in distortion of wrench.   Imposed an External Force on using TOPTUL products: For instance, add an additional steel pipe with wrench handle to enhance leverage. The increased strong force which imposed on the products can easily cause damage and distortion to the wrenches.   Using Hand tool product as Air Impact tools or Power tools: For instance, the generated intensive force from impact wrench that imposed on hand socket can easily cause cracks around the socket drive.   Misuse & Abusing TOPTUL products: For instance, misusing the screwdrivers as chisels, or hit wrenches with a hammer to increase driving force.　The bad worn products are resulted from misuse and abuse. DO NOT OPEN MULTIPLE DRAWERS AT A TIME   DO NOT USE SCREWDRIVERS AS PRY BARS, LEVERS, PUNCHES OR CHISELS   DO NOT TWIST THE RATCHET WHEN THE SOCKETS IS NOT ENGAGED TO THE FASTENER HEAD FULLY   DO NOT IMPOSE STRENGTH WHEN SCREWDRIVER BLADE TIP IS NOT VERTICAL TO THE SCREW   READ PROPER INSTRUCTIONS BEFORE USE TOOL   WEAR SAFETY GOGGLES DURING WORK AT ALL TIME