IRWIN RECORD SASH T-BAR CLAMP 136/11 78 INCH

These clamps resist twisting and distortion under clamping pressures. Both the head and slide are guaranteed unbreakable. 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.