These corner clamps are a useful woodworking tool for making furniture such as picture frames, cabinets and drawers. The sturdy canvas straps and plastic clamps will hold your picture frames securely. You can remove the jaws to maintain a different shape. Features. Sturdy canvas strap is approximately 4 metres long and is large enough to hold wooden boards The removable plastic jaws can support square, rectangular, round and polygonal shapes. You can increase the clamping pressure by turning the handle. The corner clamps are mainly used for picture frames, cabinets and drawers, holding them firmly in place and allowing even pressure to be applied to all sides when attached. A handy woodworking tool for furniture making and corner clamping of picture frames etc. Specifications. Material: plastic + steel + canvas Colour: black Length of canvas fabric: approx. 4 m / 13.12 ft Packing list: 1 x photo frame holder