Check the listing for details. WEN LA136K 1/2-Inch Keyed Drill Chuck with MT1 Arbor Taper. Condition: New. Listed at 21.82 USD. Remember when you had the perfect chuck? Secure your bits with the WEN 1/2-Inch Keyed Drill Chuck. Our MT1 arbor taper fits perfectly into any MT1 drill press, lathe, or mill and can be installed with the simple tap of a rubber mallet. The included key securely opens and closes the 3-jaw-chuck around drill bits and shafts up to 1/2 inch in diameter. This set was designed specifically for either the headstock or tailstock of the WEN 8-by-12-Inch Mini Wood Lathe (models 3420, 3420T, and 3421). - Holds drill bits, pen mandrel shafts, and workpieces up to 1/2 inch in diameter- Easily open and close the three chuck jaws using the included key- Compatible with any MT1 drill press, lathe, or mill- Installs easily with the simple tap of a rubber mallet- Designed for use with the WEN 3420T and 3421 Wood Lathe