These 90-degree parallel steel bar clamps have more benefits and enhanced features than any clamp on the market today. Cabinet Master Clamps have reinforced cast steel jaws that are protected with a durable non-marring plastic and feature a 30% larger clamping area that enables a deeper reach than other parallel bar clamps. Multiple clutch disks are made from hardened and plated round edge high carbon steel to give greater support along the 13/16" x 3/8" steel bar. Large solid maple handles are easy to grip and can apply up to 1,000 lbs. of clamping pressure. Remove the detachable end stop, and you can reverse the heads for spreading. The same end stop is also designed as a support, keeping the clamp upright for easy, one-handed use. Made in the USA.