Pony Jorgensen 3724 Heavy Duty Steel Bar Clamp offers a sliding head making it a fast-acting, easy-to-open and close clamp. The multiple-disc-clutch design allows the sliding head to hold securely at any point along the bar. The clamp strong, lightweight steel bars are rust-resistant. The iron casings have an orange baked enamel finish. Protective pads keep your project free from marring. This clamp is designed for use by dyers, hobbyists, carpenters, cabinet makers, woodworkers, metalworkers and professional trades people of all types. Cold-drawn steel screw with special, smoothly cut acme threads. The 30 mm diameter plated steel swivel can be tightened or loosened to meet your exact pressure needs. Maximum reach is 76 mm from edge of bar to center line of screw. Maximum load limit is 454 kg. Maximum open capacity between jaws is 610 mm.