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. Specification:Product Name:Screw KnobMaterial: Plastic, Carbon steelMain Color: Black,silver Tone Thread Size: M8 x 16mm / 0.30 x 0.64inch(D*L),Total Height: 34mm / 1.38inch,Head Dia (Approx): 38mm / 1.47inchThread Size: M8 x 25mm / 0.30 x 0.98inch(D*L),Total Height: 54mm / 2.14inch,Head Dia (Approx): 48mm / 1.88inchThread Size: M8 x 20mm / 0.30 x 0.79inch(D*L),Total Height: 48mm / 1.89inch,Head Dia (Approx): 48mm / 1.88inchThread Size: M8 x 30mm / 0.30 x 1.16inch(D*L),Total Height: 48mm / 1.86inch,Head Dia (Approx): 38mm / 1.47inchThread Size: M10 x 25mm / 0.39 x 0.