The Eclipse EOHBC-HD Heavy Duty One Handed Bar Clamp features a lightweight aluminium frame with a carbon steel bar that are strong and durable. The clamps are capable of achieving up to 660 lbf. of sustainable holding force depending on the size and are ideal for heavy duty work holding applications. The quick release insert trigger enables the clamp to be quickly positioned and released, whilst the easy push button system allows quick change from a clamp to a spreader. The removable pads stay fixed to the clamp giving an even distribution of clamping force across the workpiece protecting it from marking damage. Clamping Capacity: 12". Spreading Capacity: 6-5/8 to 19-7/8". Throat Depth: 3-3/8".