18 Pcs M4X10 Threaded Knurled Thumbscrew Grip Knobs Thumb Screw Product Name : Thumbscrew;Type : Screw On Head Diameter : 15mm / 0.6 inch ;Male Thread Length : 10mm / 0.39 inch MaleThread Diameter : ;Total Height : 21mm / 1.2 inch Material : Metal,Plastic;Color : Silver Tone, Black Net Weight : 23g Wonderful replacement for your broken one with this Thumbscrew. Screw on type design for easy install and with nice finish for comfortable grip. Widely used for mechanical equipment,instrument and apparatus. Oil and high temperature resistance, high quality and . Package Content : 18pcs xThumbscrew Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.