uxcell 3 Pcs Replacement M8 x 25mm Thread Hexagonal Clamping Knob 32mm Dia Product Name : Clamping Knob;Type : Screw On;Head Diameter : 32mm / 1.26" Thread Length : 25mm / 1";Thread Diameter : 8mm / 0.31" Total Height : 40mm / 1.57";Material : Metal, Plastic Color : Color;Silver Tone, Red : Silver Tone, Red Weight : 53g;Package Content : 3 x Clamping Knob