Item Descriptions:-Premium Materials: Made of emery and metal, durable and wear resistant.-Versatile Grinding Heads: 12 sizes (0.5mm-8mm) for a wide range of applications.-Compatibility: 2.35mm shaft fits most rotary tools. Note: Please replace with the correct size collet (2.4mm) when using the product.-Multi-Purpose Use: Ideal for carving, polishing, grinding, and more.-Complete Set: Includes 12 electric jade carving tools for all your creative endeavors.Package:12 x Electric Carving ToolsItem Specifications:Material:Diamond Sand, MetalShaft Diameter:2.35mmGrinding Head Sizes:12 variations ranging from 0.5mm to 8mmCompatibility:Fits most rotary tools with 2.35mm shafts.