Check the listing for details. Handle - Adjustable with Chuck - 37-760. Color: Gray, Condition: New. Listed at 10.50 USD. This multipurpose wooden-handled chuck can be used as a pin vise or a holder for taps, burs, watch parts, etc. but can also be threaded onto a tapered polishing motor spindle as a chuck mandrel adapter to fit smaller mounted wheels or burs that wouldn't fit on a full-sized spindle. End of wood handle is bored and reinforced. The chuck opens from .085" to .128" so that 3/32" and 1/8" mandrels will fit. The end of the chuck that is bored out will fit a spindle with a diameter approximately up to 11mm or 7/16" inches. The overall length is 3 1/2". If you have any questions please feel free to contact us.Please visit our store for other great jewelry and watch tools such as; Torches, Hand Tools, Crucibles, Stamps, Tongs, Borax and Much Much More! And Always, Thank You for Looking!