1Excellent Function: Brake pad measure gauge is especially designed for measuring the distance between the lower side of the backing plate and brake disc without removing the wheel. 2Slim Shape: The tool is slim enough to locate the rear of the pad backing plate, allowing the probe to measure the distance between the underside of the backing plate and brake disc. 3Applicable Brake Type: Brake pad measuring tool is suitable for both internal and external brake pads, designed for brake pads that have a normal 6mm thick backing plate (Class Iv, V). 4Professional Design: Heavy duty brake pad measuring gauge is professionally designed with a 1.5mm calibration check marking for high accuracy result, reliable in using. 5Practical Tool: The superior brake pad thickness gauge is an ingenious time saving tool, practical and important for better car performance, durable and long lasting.