The Clamp N Spread clamps have excellent hold power, with the added rubber faced pads means that the clamp can be used without the need to use timber blocks to protect the works service. The Bar-Man clamps have the following benefits that put this woodworking accessory above the rest: " Click to switch from clamp to spreader " Bar size: 20 x 6mm" High clamping force " Unique leaf spring mechanism" Available in lengths 30 100cm