1. EASY TO READ, Tire tread gauge depth 1/32" Colorful scale bar with 6 sides printing inch in order to make people read more easily. Color coded tire wear gauge clearly indicates auto tire tread different phase by different color. 2. ACCURATE MEASUREMENT tire tread gauge tool, Calibrated from 0 to 1 inch in 1/32nds as truck driver gifts. 3. CLEAR COLOR CODED ZONES of tire thread measuring gauge, Red range on bar: 0-3/32 inch; Yellow Range on bar: 3/32 - 6/32 inch; Green Range on bar: 6/32-32/32 inch. 4. CONVENIENT OPERATION. Just put the metal head into the tread of tires, press the black flat edge onto the edge of the tire to read the result which greatly guaranteed our travel safety (school bus must) 5. DURABLE AND USEFUL, Tread-depth gauge made of durable plastic and stainless steel materials. Comes with a pocket clip, easy to carry. Regularly monitor tire tread levels to ensure safer driving. Suitable for auto,car, trucks, motorcycles, automobiles and passenger vehicles,SUV,ATV,UTV.