The Gardner Bender GCM-500 Analog Clamp Meter is a 4-function, 8-range manual-ranging tester specifically designed to measure AC current (up to 600A) and ACDC voltage (up to 600-60V) with resistance (up to 1000 ohms). Uniquely, the 1.5-inch jaw size offers the clamp-on feature, allowing measurements from live conductors without contact. Ideal for any professional, the GCM-500 includes a lockjaw feature, 8-position smooth rotary dial, zero ohms adjustment dial, and data hold switch for easy-to-read measurements.