Use it before trips, during routine checks, or when switching between winter tires ( recommended 4mm depth) and hot day tires ( recommended 1.6mm depth) to ensures optimal and adherence to standards Its user friendly functionality allows treads depth assessment, promoting safe driving by identifying when tires require replacement based on specific depth guidelines This portable tire treads depth gauge keychain enables instantly measurement of tire wear, ensuring driving by quickly verifying treads depth ideal for maintaining vehicle security Made from, it weighs only 9g and measures 60x30mm, featuring a compact, lightweight design that attaches easily to keys without adding bulk or clutter Perfect for car owners, driver, and automotive enthusiasts who regularly monitor tire conditions for compliance during maintenance or seasonal changes, Manufacturer: APGLSXY