1. Useful and practical.2. You can use it for DIY polished engraving, cutting, polishing wood/metal, grinding, removing metal rust and so on.3. Easy and safe to operate and storage.4. It can be used for jade carving machine, grinding mill, hanging mill.5. This electric polishing kits has grinding paste, grinding stone, sandpaper, polishing wheel, polishing paste, nylon brush, steel wire brush, drill connecting rods, etc.Type: Rotary Tool SetHSS Saw Blade: Brass, Aluminum, Thin Metal, Soft Metal etc.Diamond Saw Blade: Perfect for Cutting Jade gemstones, glass, geramics, porcelain, tiles, carbide, rocks, aluminium and copperDIY Supplies: Metalworkingcolor:Photo colorMaterial:MetalPackage Contents:60 x collet set51 x Abrasive Rings30 x Grinding Needles6 x small dental drillsOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.