The BESSEY TG30K is an electronic part with a parallel clamp made from cast iron, featuring a thumbwheel and a diameter of 140mm. It is designed for a wood material such as a tabletop, cabinet, or some other wooden structure. It features an easy-to-adjust screw that helps to hold the material in place, and a rotating knob provides further stability. The clamp is designed to be used in industrial settings, providing a robust and precise connection that ensures stability and strength.