Tire Tread Depth Gauge, Product Type Tire Tread Gauge, Gauge Type Pencil, Material Plastic, Steel, Overall Length 2 in, Tread Depth Calibration Increments 1 in, Tire Pressure Calibration Increments Not Applicable, Minimum Operating Air Pressure Not Applicable, Maximum Operating Air Pressure Not Applicable, Includes Steel Pocket Clip, Color Black, Silver, Features Plastic Indicating Bar, Finish Chrome Plated, Maximum Operating Temperature 122 Degrees F, Maximum Rim Hole Size Not Applicable WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov - Nickel (Metallic)