Tread Depth Gauge Product Type Tire Tread Gauge Gauge Type Pencil Material Brass Overall Length 3 in Tread Depth Calibration Increments 1/32 in Tire Pressure Calibration Increments Not Applicable Minimum Operating Air Pressure Not Applicable Maximum Operating Air Pressure Not Applicable Includes Pocket Clip Features Measures Tread Left on Tire Finish Chrome Plated Package Quantity 20