Description: Great replacement for your broken one with this Star Knob. Screw on type design for easy install and with surface nice finish for comfortable grip. Widely used for lathe machine, mechanical equipment, instrument and apparatus, food and industry equipment. Specification: Product Name: Clamping Knob Main Color: Black Material: Bakelite,Brass Star Head Diameter: 38mm/1.5 inches Female Thread Diameter: M10 Total Height: 29mm/1.1 inches Net Weight: 116g Package Content: 4 x Clamping Knob