Record Power RPC-T/66 T-Bar clamps. These are our heaviest duty bar clamps suitable for the most arduous clamping applications. The steel bar is made from a strong thick ‘T’ section for greater strength and rigidity. The clamp-heads and slides are made from an even heavier cast steel section and the heads have pre drilled holes in the flattened backs so they can be bolted to a bench, floor or wall – temporarily or permanently. Similar to the Sash Clamp, the slide is held in position by a solid steel pin passing through locating holes along the bar and the clamp-head is tightened through the lead screw which has a rolled thread for strength, speed and smooth transmission of clamping pressure.