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 1-3/16-Inch x 3/8-Inch steel bar. Large solid maple handles are easy to grip and can apply up to 1,000-Pound. 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..