These clamps have many advantages over the old styles of sash and T Bar clamps. There’s no fiddly pin and chain to insert into a hole - just slide the jaw against the workpiece and twist the handle to deliver up to 7,000 N of pressure. 

The very large face area protects the work but more importantly it remains at right angles ensuring perfect parallel clamping with no surface damage.

The jaws are fitted with nylon face pads which further safeguard the work surface and also shed off any glue.

Using these clamps will provide a far better glue joints due to the guaranteed parallel clamping force.