SPEEDJAW 3 in Handscrew Clamp Roof Flashing Durable Wear Layer: Scratch resistant Item Weight:17.637 Durable Wear Layer: Scratch resistant while the black and synthetic material projects firmly in place with up to 300 pounds of clamping force IRON AND STEEL CONSTRUCTION Constructed with a resilient ductile cast iron body with a plastisol padded locking handle SWIVELLING CLAMP PAD Fully adjustable pad base allows height and angle changes for better grip on odd shaped projects 3 4 INCH SHAFT 3 4 inch diameter threaded shaft allows for up to 3 inches of height adjustment DUCTILE IRON PAD Includes a removable ductile iron clamp pad that provides more surface area and better grip on metal projects REMOVABLE BASE Base and shaft are removable allowing for additional temporary or permanent mounting options VERSATILE Clamp pad is compatible with SPEEDJAW 93622 Curved and 93623 Non marring 1 inch jaw pads for added versatility (sold separately)