Eclipse E20-3 Heavy Duty G-Clamp 3 Inch / 75mm  The Eclipse E20-3 has a clamping force of 455kg (1000lbs). Guaranteed unbreakablemalleable iron frame with a fast action twin start rolled acme thread. The steel swivel shoe applies an even pressure, even on angled surfaces, whilst the tommy bar will bend before the frame can become over-stressed.  Features:   Acme thread  Steel swivel shoe  Guaranteed unbreakable  Malleable iron frame   Specification:  Part No: E20-3  Clamping Capacity: 3\" (75mm)  Frame Proof Loads: 1000lbs / 455kg  Weight: 1kg