PMD Products 1/2" Keyless Drill Chuck Replacement 1/2 x 20 UNF 13MM fits most drills 1/2 inch

Easy to replace your defective chuck with this replacement or upgrade you keyed chuck to keyless. To install this chuck: To replace open the jaws on your old chuck all the way and there should be a screw in the bottom (or a hex bolt). either way remove this screw/bolt. The broken chuck will unscrew off. The tough part is holding the shaft while you unscrew the chuck from it, usually this is done by jamming a screwdriver blade, vise-grip, wrench, or other tool to hold the shaft from rotating or you could reverse the drill rotation and apply power to the drill to help remove the fastener. Open the new keyless chuck jaws all the way. Screw the new chuck onto the drill or by using the drill's own power in the opposite direction. Then using the existing hardware, screw or hex bolt from your removed broken chuck, secure the chuck to the drill by threading this fastener back onto the drill shaft. Our chucks have the ability yo use a thin wrench on the back to secure the chuck and drill shaft while you tighten the fastener.