M8 x 70mm Male Thread Screw Hex Head Clamping Knob 4 Pcs Product Name : Clamping Knob;Type : Screw On Head Diameter : 37mm/ 1.46";Thread Diameter : 8mm/ 0.3"(M8) Thread Length : 70mm/ 2.8";Total Length : 87mm/ 3.4" Color : Black, Silver Tone;Material : Metal, Plastic Weight : 134g;Package Content : 4 Pcs x Clamping Knob