The BESSEY - GS12-8K is a bar clamp, constructed with a rigid steel bar and fixed and sliding heads that lock to apply pressure. It is intended for use in assembly, woodworking, gluing, metalworking, etc. The Bar Clamp operates with a profiled rail bar type. Key Features of the BESSEY - GS12-8K Bar Clamp include: Bar Specifications: The clamp's bar is made of steel with dimensions of 9/32 in, 5/8 in, and a width of 5/16 in.Clamping Capacity: It has a clamping capacity of 4 in with a maximum clamping force of 550 lb. Handle Specifications: The clamp is equipped with a sliding T-handle design, made from tempered drop-forged steel. The handle length is 3 3/16 in.Jaw Pad Type: The clamp uses a swivel jaw pad, perfect for contact on non-flat surfaces.Sliding Mechanism: The Bar Clamp utilizes a Bar Slide mechanism enabling movement of the sliding jaw along the bar.Swivel Type: The swivel mechanism is non-replaceable.Load Capacity: The Bar Clamp has a maximum load of 550 lb.