
Made of engineering plastic, this gauge is durable and has a long service life. Designed with magnet on the standing feet so that it holds firmly on ferromagnetic surfaces. The dual-purpose gauge can be used to measure the height of the object and also the aperture depth. This gauge supports the unit of mm, inches and fraction, it needs a CR2032 3V battery. "INC/ABS" button to switch between absolute (ABS) and incremental (INC) measuring mode.