The one-handed operation leaves the second hand free, e.g. to position the workpiece. The contact pressure can be adjusted by a knurled screw. Two large, movable pressure plates (Ø 45 mm) spread the clamp pressure evenly, therefore it is also suitable for soft wood and tapered workpieces. A locking mechanism prevents unintended loosening of the clamp (e.g. due to vibrations). A lever between the handles releases the lock. Made of heat-treated alloy steel for high stability and a long service life.