Features Efficient Use: Ensuring smoother grinding performance under high speed, the rotary file enables high work efficiency. Broad Utility: Allows for wide application on the fine carving of resin, plastic, porcelain, soft metal, stone, etc. 5pcs in Total: Including 5pcs different grinder bit, which can cut out various shapes to meet your various work needs. Perfect Match: With universal hex shank to work with electric polisher, carving knife and other tools, very practical. Good Material: Using high speed steel material with good hardness, very durable with wearing, heat and long term use. Specification: Item Type: Rotary File Material: High Speed Steel Colour: Gold Application: Suitable for fine carving of resin, plastic, porcelain, soft metal, stone, etc.  Package List:5 x Rotary File Package List 5 x Rotary File