This hold-down clamp is an efficient way to secure work to a workbench with a grid of dog-holes. Similar to Bessey's fast-acting clamps, it has a movable jaw that can be quickly adjusted to different heights. It has an 8" capacity and 4" throat depth. The sturdy 7/8" × 3/8" rail, with a profile similar to an I-beam, is rigid enough to withstand up to 550 lb of clamping force.
Tightening the clamp is accomplished with a classic T-bar handle. The spindle has Acme-cut threads for smooth adjustment, and the jaw is tempered for strength. A removable plastic pad keeps the end from marring your work.
Originally designed to mount on a steel welding bench using a 16mm bolt, the clamp requires a workbench adapter (available separately) for use on a wooden bench.