The Pony 3/4-inch pipe clamp has become America’s most popular and widely used pipe clamp fixture design. It is ideal for metalworking, woodworking, and frame assembly - in applications that range from do-it-yourself to industrial production. Screw is 5/8" diameter steel with special, smoothly cut Acme threads and clamping faces are approximately 1-3/4" square. Mounts on any length 3/4" black pipe with both ends threaded (pipe not included).