Our Jorgensen Medium Duty Steel Bar Clamps are our most popular medium duty steel bar clamp. They are used by do it your selfers, hobbyist, carpenters, cabinet makers, woodworkers, metalworkers and professional trades people of all types. It is a sliding head design: the sliding head is threaded to accommodate the screw with wood handle and swivel pad. All adjustments are made in the moveable sliding head, making this style fast acting, easy to open and close and suitable for close quarters clamping. You can easily move the sliding head up and down the bar. The 3/8 inch steel screw with a varnished hard wood handle and ¾ inch diameter plated steel swivel can be tightened or loosened to meet your exact pressure needs. Our 3748 has a 48 inch opening capacity, a 2-1/2 inch reach and a 600 pound load limit. The strong, light weight 1/4” x 3/4” steel bars are plated to be rust resistant. The Multiple-Disc-Clutch design consist of two hardened plated steel clutch disc and one spring which allows the sliding head to hold securely at any point along the bar. The iron castings have an orange baked enamel finish. The Chicago based Adjustable Clamp Company which was established in 1903 is the manufacturer of all Jorgensen Bar Clamps. The Jorgensen Bar Clamps are assembled with U.S. and foreign parts in our Chicago factory.