These sanding drill bits for rotary tools are designed to fit in a wide range of sanding applications. The sanding drill bits are made of steel and emery material, which has an excellent texture and you can use them with much more confidence. Different shapes and sizes can meet your needs very well. Features -Color:Chocolate -Material:Steel, emery -Size:3.90X1.00X1.00cm/1.53X0.39X0.39in -Size:3.90X1.50X1.50cm/1.53X0.59X0.59in - These sanding drill bit are versatile and can be used for a range of sanding tasks, including polishing, grinding, and shaping. - The grinding stone head for rotary tool can offer good polishing results with uniform grit, remove rust from metal castings. - Practical grinding stone set is an for woodworking projects, bring you much more convenience. - Grinding stone head feature with abrasion resistance, acute abrasive grains, less dust when polishing. - The grinding stones are suitable for sanding delicate items, satisfy your demands . Package list: 14 x Grinding Wheel Heads(1 cm Shape) 14 x Grinding Wheel Heads(1 cm Cylinder Head Shape) 14 x Grinding Wheel Heads(1.5cm Cylinder Head Shape)