1、Polishing head is made of corundum which is high hardness, wear resistance, have good polishing effect. 2、It is an efficient polishing tool in small area of rust deburring and surface polishing. 3、Grinding heads come in different sizes to meet your different needs. 4、Mainly used for DIY polishing, trimming, polishing, grinding, sanding and so on. 5、Suitable for high-speed electric / pneumatic grinding and polishing power tools. Features: Polishing head is made of corundum which is high hardness, wear resistance, have good polishing effect. It is an efficient polishing tool in small area of rust deburring and surface polishing. Grinding heads come in different sizes to meet your different needs. Mainly used for DIY polishing, trimming, polishing, grinding, sanding and so on. Suitable for high-speed electric / pneumatic grinding and polishing power tools. Specification: Material: Chromium corundum Shank diameter: 6mm / 0.2in Shape: ball type grinding head Size: 6 * 16mm / 0.2 * 0.6in, 6 * 20mm / 0.2 * 0.8in, 6 * 25mm / 0.2 * 1in, 6 * 30mm / 0.2 * 1.2in (Optional) Quantity: 10pcs Package List: 10 * Ceramic Mounted Point Grinding Stone