The Stanley Tools FatMax® Clutch Lock F-Clamps have a cast iron body which gives them strength and durability. Fitted with a stock lock to avoid any unexpected movements. The cold rolled steel reduces any bending or give, whilst the ergonomic handle makes it easy to grip and use. They even have soft soles/grips to avoid any marking or damage on the material/work surface.The Stanley Tools FatMax® Clutch Lock F-Clamp has the following specification: Clamp Depth: 80mm.Clamp Capacity: 800mm.Clamping Force: 635kg.Additional Information:Capacity (mm): 800Throat Depth (mm): 80