The Double K 503 General Purpose Handpiece converts a compatible 401 cable-drive system for nail grinding. Its quick-detach connection replaces the clipping handpiece, allowing the separate motor to drive a selected grinding attachment.

The handpiece includes 1/8-inch and 3/32-inch collets and the wrenches used to open them. A retractable sleeve moves back for fitting the working attachment and forward to cover moving components. The number 560 grinding stone shown with this handpiece is an optional part and is not included.

The slim body is 6-1/8 inches long and 5/8 inch in diameter, with a listed weight of 3.55 ounces. Match the attachment shank to the correct collet when configuring the tool. This listing supplies the handpiece rather than a self-contained powered nail grinder.