Description:1., Great replacement for your broken one with this knob., 2., Screw on type design for easy install and with surface nice finish for comfortable grip., 3., Widely used for lathe machine, mechanical equipment, instrument and apparatus,industry equipment. Buy uxcell 6pcs m4 x 16mm star knobs plastic hex shaped hand clamping knob screw at , get more threaded-stud knobs in various size Great replacement for your broken one with this knob. Specifications:Product Name: Clamping KnobKnurled Head Diameter: 16mm/ 0.63''Male Thread Diameter: M4Thread Length: 30mm/ 1.18"Total Height: 40mm/1.57"Net Weight: 67gMain Color: Black, Silver ToneMaterial: Bakelite, Metal Package Content:12 Pcs x Clamping Knob. Uxcell M8 X 30mm Male Thread 38mm Head Star Knobs Zinc Plated Black 3 Head Diameter : 25mm/0.98";Thread Size : M4 x 16mm/0.16"(D*L); · Main material: plastic, metal · Main Color: Black · Great replacement for your broken knob M6 Bolt Uxcell Clamping Handle Screw Knobs Handle Star Knob Malaysia Christmas Tree Stand Screws Specification:Product Name:Clamping Handle Knob Main Material: Plastic, Metal;Main Color: BlackTotal Height:27mm / 1., 06Head Dia:25mm / 0., 98Thread Size: M4 x 16mm (D*L); Package Content: 3pcs x Clamping Handle Knob, Head Dia:25mm / 0., 98; Thread Size: M4 x 16mm (D*L);