Gardner bender offers over 50 years of experience making professional electrical testers, tools, and supplies so you can count on us to provide quality-performing products for professional and DIY use. This tester includes a 1., 5 Inch jaw size with the lockjaw feature that prevents misuse by only allowing the jaws to open in the amps mode. Analog Clamp Meter,4 Func.,8 Range, Audible Continuity Yes, Maximum AC Current Measurement 6 A, Maximum AC Voltage Measurement 600 V, Maximum DC... Gardner Bender GCM-500 Analog AC Clamp Meter, 4 Function, 8 Range, with... Measure current drawn by appliances Unit meets cETLus agency approvals, is fuse and diode protected, and includes a calibration screw. 6 Function Digital Manual Ranging Clamp Meter/ GCM-221 - Lumbra Inc Measurement lock features holds indicator in place Measure current, voltage, and resistance Unit also offers an 8 position smooth rotary dial, zero ohms adjustment dial and a data hold switch to maintain the reading on the easy-to-read display. Clamp Meter Gardner Bender Compact GCM-221 Gardner Bender Gcm-500 Ac Clamp Meter With Lockjaw 2 Tester provides a 3ft drop and 150 lb. Lockjaw feature prevents misuse - jaws only open when dial is set to amp s