Material: Made of high quality stainless steel, corrosion and rust resistant, very strong and not easy to break. It is used to fasten two parts together by turning screws. It is very suitable for working with wood and metal parts. Dimensions: length 34mm / 1.3in, width 24mm / 1.0in, height 30mm / 1.2in, opening 30mm / 1.2in, clamping range 16-25mm / 0.6-1.0in. The hole diameter is an M8 threaded hole with an adjustable set screw, which can be easily clamped on any desktop, and the clamping thickness is about 0.6-1in. Designed for photography, carpentry, welders, construction workers, trucks or DIY.