Premium Material: The wood pipe sturdy clamp is made of sturdy cast iron, it is molded full aluminum molds and there is a rust on the outside, which is practical and has a long service life Pipe Clamp Threaded Pipe: The wood gluing clamp set is designed for all types of wood clamping, simply slide the pipe clamp through any length in pipe to hold wood in place for gluing and drilling Quick Release Clamps for : Spring lever control will lock jaw at needed location and provide quick release; This woodworking clamp features ergonomic grip handle for easy and fast clamping, offers efficient woodworking Wide Application Pipe Clamp : The woodworking pipe clamp is a great addition to any woodworking work bench, an necessary tool for carpenters, woodworkers, metalworkers, hobbyist and other professionals Easy to Use: Adjust the handle to strengthen the clamping force and add a coil spring to prevent clamps from slipping. Easy to assemble, ideal for woodworking with a wide range of applications from industrial to do it-yourself type projects Specification: Material: Iron Size Chart: Diameter:2.1cm/0.83inch or Diameter:2.6cm/1.02inch Package Includes: 1x Wood Gluing Pipe Clamp  Note: Please allow slightly errors 1-2cm differences due to manual measurement.