The ergonomic pen design with smooth metal surface makes cutting, sanding and polishing easy and comfortable, especially for long-term use. There is no need to meet the interface specifications of the electric grinder. As long as your electric grinder or electric drill can be clamped to the size of 3mm, the flexible shaft can be connected. It can be used with polishing kits, drill bits, wire brushes, burrs, flap wheels, mounted stones and grinding wheels. Installation is simple and convenient, just tighten the connector handle on the electric grinder. A sturdy metal flexible shaft is included so that you can use a bit on an object and leave your other hand free to rotate the object when working. and there is no need to replace the clamp frequently, and the clamping range is 0.3-3.2mm), which eliminates one-time clamping. range of the previous collet, and should be equipped with multiple chucks of different sizes. Now this three-jaw chuck is easy to install, just screw it directly, simple and convenient 2: It is not necessary to match the interface specifications of the electric grinder. As long as your electric grinder or electric drill can clamp the size of 3.175 mm, you can install this flexible shaft. Installation is convenient and simple, just clamp the common handle to the electric grinder and tighten it. 3: The front handle part of the flexible shaft is made of aluminum alloy. 4: A matching electric grinder is required for use. (This flex shaft has no machine, please buy another machine) Color as shown Shipping Quantity: 1 piece