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 KnobMain Color:BlackMaterial: Bakelite,BrassHead Shape: Seven-pointed StarStar Head Diameter :39mm/1.54''Female Thread Diameter:M8Total Height: 29mm/1.14"Net Weight:119g Package Content:4pcs x Clamping Knob