The Irwin Record 135 Series Heavy-Duty Sash Clamps have a bar section of 32 x 6mm (1.1/4 x 14in). 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.Select Option 1050mm (42in) Capacity1200mm (48in) Capacity1350mm (54in) Capacity1650mm (66in) Capacity600mm (24in) Capacity900mm (36in) Capacity Add to Basket Quantity