5-83-124 Stanley Tools 150mm Auto Trigger Clamp from the Fat Max range with a jaw capacity is 150mm and a large 200kg clamping force with the added advantage of converting easily to a spreader, made from re-inforced nylon for durability , the removable jaw pads & an oversized jaw face won't mark work surface and the clamp is fitted with a patented rapid return spring mechanism making the 5-83-124 one of the fastest bar clamps in the UK market