PRODUCT DESCRIPTION Jorgensen's Medium Duty Steel Bar Clamps are ideal for all types of clamping and are workhorses for their size and design. Used by Do-It-Yourselfers, hobbyists, carpenters, cabinet makers, woodworkers, metalworkers and professional trades people of all types. These clamps rest parallel on work surfaces for ease of work placement and adjustment. The steel screw and easy-grip handle can be tightened or loosened to meet your exact pressure needs. This clamp has a 36 in. opening capacity, a 2-1/2 in. reach, and a 600 lb. load limit. The strong, light weight 3/4 in. by 1/4 in. steel bar is plated to be rust resistant. The Multiple-Disc-Clutch design holds securely at any point along the bar. FROM THE MANUFACTURER Perfect for fixtures or small boxes, the 36-inch steel bar clamp has a 2-1/2-inch reach and a sliding head design. The sliding head is threaded to accommodate the screw. All adjustments are made in the movable sliding head, making this style easy to open and close and suitable for close-quarters clamping. A multiple-disc clutch permits instant adjustment, secure hold, and easy release. The strong yet lightweight bars are rust-resistant. Bar is 1/4-by-3/4-inch plated steel with a 3/8-inch-diameter steel screw. 600-pound clamping pressure.