ITEM NAME:30pcs Diamond Grinding Cutting Burr Set Drill Nail Bit Rotary Tools Grinder Description Size: rod diameter 3mm Weight: 100g Color: silver Material: Diamond Product list: 30pcs Description: 1. Specially used to repair molds on various materials. Milling grooves. Engraving, can be used for furniture, handicrafts, molds, music, various models, ship models and so on. 2. The utility model has the characteristics of high grinding performance, simple manufacture and low cost, high grinding processing quality and can be applied to large-scale grinding processing. 3. Shape: ball, cylinder, sharp needle, bullet, etc. High quality store for you! 30Pcs Grinding Cutting Head Drill Bits Shank Diamond Rotary Carving Polishing.30Pcs Grinding Cutting Head Drill Bits Shank Diamond Rotary Carving Polishing. Product list: 30pcs. The utility model has the characteristics of high grinding performance, simple manufacture and low cost, high grinding processing quality and can be applied to large-scale grinding processing.