Product feature: Set of 6 diamond nail bits with 150 pieces of sanding circles. Ideal for electric nail drills and other drills that use sanding bands. Choose different thicknesses according to different grinding requirements. You can do your nails with DIY at home, saving time and money. Specifications: Quantity: 150 pieces + 6 nail bits. Optional types: #80, #120, #180. Package including 1 set * 6 nail bits, 50 pieces * #80 sanding bands, 50 pieces * #120 sanding bands, 50 pieces * #180 sanding bands.