The IRWIN Record 135/2 Sash Clamps are heavy-duty clamps with a bar section of 32 x 6mm (1.1/4 x 14 in).
The slide and head are guaranteed unbreakable and the slide is secured by a solid steel pin passing through one of the locating holes spaced along the steel bar.
The steel mainscrew applies pressure quickly and smoothly through a fast acting; hard-wearing rolled thread.
Slides and heads are flat bottomed so that the clamp will stand without support.