Description: 2-in-1 Function: The gauge can be used to detect the thickness of the brake pads and the depth of the tire tread. Easy to Operate: The test pen is small in size. The pen holder design allows it to be hung on your jacket pocket for easy carrying. Ingenious time saving tool and essential for any garage. Measures the brake pad the on vehicle without removing the road wheel. Slim design enables the tool 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. Suitable for both internal and external brake pads and features a 1.5mm and calibration check marking. Specification: Product name: Thickness Gauge Material: Metal Color: Black+Silver Size: About 13.5 x 1.3cm(L*W) Package Included: 1Pc * Thickness Gauge Note: Transition: 1cm=10mm=0.39inch 1. Due to the light and screen difference, the items color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement.