Screw On Type Star Head Thumbscrew Clamping Knob M6 x 15mm 5 Pcs Product Name : Clamping Screw Knob;Type : Screw On Head Size : 37 x 10mm / 1.5" x 0.4"(D*H);Thread Length : 15mm /0.6" Thread Diameter : 6mm / 0.24"(M6);Total Height : 32mm /1.3" Material : Metal, Plastic;Color : Silver Tone, Black Weight : 65g;Package Content : 5x Clamping Screw Knob