JORGENSEN 8048 Cabinet Master 48 Inch 90 Degree Parallel Steel Bar Clamp These 90-degree parallel steel bar clamps have more benefits and enhanced features than any clamp on the market today This product is easy to use easy to install and highly durable Multiple clutch disks are made from hardened and plated round edge high carbon steel to give greater support along the 1-3/16" x 3/8" steel bar Maximum opening capacity is 48 inches Clamping faces are 3-3/4 inch height and 1-7/8 inch width Maximum load limit is 1,000 pounds Ideal for do-it-your-selfers, hobbyist, carpenters, cabinet makers, woodworkers, metalworkers and professional trades people of all types Pony Tools Inc. (founded 1903) is the manufacturer of the bar clamps and they are made with U.S. and foreign parts in our Chicago factory