Unique hook-on function separates and grabs wires, without using your hands
Retractable post makes hook release fast and easy
Inrush (starting) current capture, APO (Auto Power Off), and Min / Max / Hold
The testo 770-1 hook clamp meter is ideally suited for electrical work in HVAC applications. Testo’s unique hooking clamp design can be used to separate and grab wires. The easy hook-off retractable post releases the wires when testing in tight spaces. You can safely work without using your hands.