Item Type: Rotary Grinder Flexible Shaft Material: Rubber + ABS + Stainless Steel Uses: Suitable for most rotary tools, such as most for dremel power tools, grinders, engraving machines, mini drills, polishing machines, etc. Collet Maximum Clamping Range: 3.175mm (1/8in) Connector Diameter: Approx. 3mm / 0.12in Maximum Load Speed: 8000-12000rpm1STABLE OPERATION: The shaft connector has high concentricity, the operation is stable and not easy to shake, with high safety. 2SIMPLE CONNECTION: The flexible shaft can be inserted into the electric grinding and fix the chuck, convenient in connection. 3EASY TO DISASSEMBLE: Insert the wrench into the socket and lock the drive shaft to loosen the chuck to replace the grinding head. 4CLAMPING RANGE: The maximum clamping range of the collet is 3. 175mm (1/8in), and the clamping is firm and not easy to loosen. 5WIDE APPLICATION: Fits most rotary tools like for dremel most power tools, grinders, engravers, mini drills, polishing machines, etc. 1 x Flexible Shaft