Function: 1. Good grinding effect, easy and convenient for installation.2. Made of high quality metal and sandpaper material, durable in use.3. 400# grinding head, wonderful polishing accessories for jewellery processing.4. Including 10 pieces grinding head of the package that meets your different requirements.5. Wonderful replacement for the old or broken grinding disc.Specification:Condition:100% Brand New Item Type:Grinding HeadMaterial:Metal + Sandpaper Type:400#Use:Polishing,Jewelry Tools AccessoriesQuantity:10pcs package list. 10 x grinding heads