Thumbscrew - TOOGOO(R) 6 Pcs M4x10 Threaded Knurled Thumbscrew Grip Knobs Thumb Screw Product Name : Thumbscrew;Type : Screw On Head Diameter : 15mm / 0.6";Male Thread Length : 10mm / 0.39" MaleThread Diameter : M4;Total Height : 21mm / 1.2" Material : Metal,Plastic;Color : Silver Tone, Black Net Weight : 23g;Package Content : 6pcs xThumbscrew