Flexible Shaft - Power tools (electric mill, mini drill and carving mill) extension, so that small parts of the workpiece can be ground to. Premium Material - Use of high-strength carbon steel core to create, hardness, not easy to break, the use of smart convenient. High Compatibility - If the electric grinder or drill can clamp 3.175mm shank which can fit; Easy to Install - Fit directly into the chuck of any cordless or electric power drill. Widely Used - It may be used with polishing kits, drill bits, wire brushes, countersinks, flap wheels, mounted stones and grinding wheels.