The BESSEY - 4800J-20 is a bar clamp with steel bar, fixed head, sliding head, and a bar slide mechanism for adjustability. It is designed to hold workpieces within the clamp’s maximum jaw opening (20 inches) and clamping force (4,880 lbs) limits during assembly, gluing, cutting, or machining operations. Key Features of the BESSEY - 4800J-20 Bar Clamp: Bar Material: The bar material is steel with profiled rail design.Clamping Capacity: Maximum jaw opening is 20 inches.Clamping Force: Clamping force is 4,880 lbs maximum.Handle: The clamp's handle is a steel handle with a sliding T-style design.Swivel Pad: The jaw pad is swivel; this provides adjustable contact with workpiece surfaces.Max. Jaw Opening: The maximum jaw opening is 20 inches.Throat Depth: The throat depth is 7 inches.