40 PCS low Speed Micro Polishing Drill Bits Include Tungsten Carbide Burr, Silicone Polishers, Diamond Burs, Hair Brush by Dr. House Go to amazon.com Related posts How to buy the best handpieces dental? FeatureHigh quantity of stainless steel make sure the long service.Different of material suit for different use. DescriptionQuantity: Hair brush: 4pcs Tungsten carbide burr: 2pcs Diamond Burs: 30pcs Silicone polishers: 4pc Shaft Diameter: 2.35mm