Eclipse E20-12 Heavy Duty G Clamp 12 Inch / 300mm The Eclipse E20-12 Heavy Duty G Clamp has a guaranteed unbreakable malleable 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: 300 mm clamping capacity Frame proof loads 2500 lbs 1136 kg Guaranteed unbreakable malleable 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 Specification: Size: 12 Inch / 300mm