Mitutoyo Tire Tread Depth Gage The Mitutoyo ABSOLUTE digital tire tread depth gage measures depths with high accuracy. Its size and light weight makes the gage easy to use. The gage scale, blade and measuring rod is constructed of hardened stainless steel for added durability. Measurements are displayed on a digital LCD readout with SPC output for easy automatic recording. Features include... Digimatic Tread Depth Gage can keep track of the origin point once set for the entire life of the battery. Specially designed to measure tire tread depth. With SPC data output. Specifications include... 0-1" / 25.4mm Measuring Range 0.0005" / 0.01mm Resolution 0.118" / 3mm Diameter Measuring Rod 0.031" / 0.8mm Contact Point Diameter 0.126" / 3.2mm Length