Grinding accessory set for multi-tool, 27 parts. Includes: grinding stones (5 pcs), sanding belts (grits 60, 120 & 240) and grinding mandrel, and a key. Spindle arm diameter: 3.2 mm. Highest speed: 35000 min-1. Package contents: 27 pcs. Compatible with any multi-tool with a 3.2mm collet, such as Ryobi, Dremel and other brands.