Tweco Roto-Work ground clamps are designed primarily to work in conjunction with the Tweco Roto-Ground Device. However, they may also be used for other high amperage grounding applications. The roto ground shaft screws into the tapped back of the Roto-Work Clamp. The clamp is quickly attached or moved from one rotating weldment or fixture to the other without removing the roto ground from it. Saves welding down time. Roto-Work clamps are made from a copper alloy. They come in 600, 1200 and 2000 ampere capacity. Number WCRG- 2000 has two tightening screws. Number WCRG-600 works only with No. RG-230 due to its smaller shaft size. Large tightening screws and ample contact surface area provide cool, efficient operation.