These clamps perform particularly well when it comes to applying edge mouldings. You can position and tighten them with one hand, leaving your other hand free to hold the work in position. They work equally well on straight, concave and convex curved edges. The cast alloy frame is strong. The light weight is especially good when using a number of clamps around a curved workpiece. The spring-loaded, eccentric cams that form the jaws have a high-friction resilient rubber over-mould. This ensures a firm non-slip grip and prevents damage to the workpiece. As you apply pressure with the handle, the cam jaw grips ever tighter for an ever firmer hold. A swivelling plastic end cap on the screw protects the work. Grip range 10mm to 48mm, jaw depth 80mm.