Used as a Selective clamp for ground loop resistance measurement around power pylons. Inner diameter of the clamp is 320 mm (12.6 in). Includes the split core transformer and all necessary adapters/connections for the Fluke 1623 and Fluke 1625.

External dimensions (LxWxD): 46 cm x 36 cm x 16 cm (20.5 in x 16 in x 17.2 in)
Weight: 8 kg (17.6 lbs)