SPI Electronic Tire Tread Depth Gage Designed for depth measurements of shoulders, small bores or inside grooves. Features include... Large LCD Display Zero-set at any point Stainless Steel Measuring Rod Specifications include... 0-1" / 30mm Measuring Range 0.0005" / 0.01mm Resolution 0.0015" / 0.03mm Accuracy 2.36" / 60mm Base Length Includes Certificate of Calibration traceabloe to NIST
