The Jorgensen 55 3/4-Inch Pro Pipe Clamp Fixture features: wider and taller stance, taller and wider jaws, built-in clamp stand, longer screw and built-in clamp hanger. Clamping jaws 2-1/8`-Inch. It sits 2-1/2`-Inch above work surfaces. Ideal for metalworking, woodworking and frame assembly. For applications that range from do-it-yourself to industrial production. Mounts on any length 3/4-Inch black pipe with both ends threaded (pipe not furnished). Iron castings are iron with orange and black baked-enamel finish. The 5/8-Inch diameter steel hardened screw has a crank-type handle. The multiple-disc-clutch assures flawless clamping pressure. From the maker's of the line of Pony Pipe Clamp Fixtures.