This ingenious time-saving tool is essential for any garage  The Sealey VS058 Brake Pad Thickness Gauge measures the brake pad on the vehicle without removing the road wheel. The 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 the brake disc. Features:   Ingenious time-saving tool and essential for any garage  Measures the brake pad on the vehicle without removing the road wheel  The 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 the brake disc  Suitable for both internal and external brake pads and features a 1.5mm and calibration check-marking  Designed for brake pads that have a normal 6mm thick backing plate (Class IV, V) Specification: Range: 1.5-13mm