Polishing grinding heads have high-quality abrasive head and shaft handle. You can use it with electric grinder(not included), crane grinder(not included), wind grinder(not included), electric drill(not included), etc. They are perfect tools for DIY polishing, polishing jade or wood or metal, etc.   Type: Grinding Head Shank Diameter: 3mm Material: Rubber, Galvanized Iron Handle Features: Assorted Size, 3mm Shaft, Durable, Polishing Accessories Storage Box Size: 11.5cm x 11.5cm x 6cm or 4.52" x 4.52" x 2.35" (Approx.) Grinding Head Size: 3mm x 4mm or 0.12" x 0.16", 3mm x 5mm or 0.12" x 0.2", 3mm x 6mm or 0.12" x 0.24", 3mm x 8mm or 0.12" x 0.32", 3mm x 10mm or 0.12" x 0.4" (Approx.)   Notes: Due to the light and screen setting difference, the color of item may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.   Package Includes: 100 x Grinding Head (Pointed Tip and Cylindrical Tip) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.