The Jacobs Multi-Craft Drill Chuck is mounted as original equipment on more drills than any other chuck by both domestic and import drill manufactures.
The Jacobs Adapt-A-Drive 1/4 inch chuck with hex key is ideal for use in starting screw holes for use in hard to reach spaces. Integral hex mount locks the Adapt-A-Drive chuck into the screwdriver bit socket.
Jacob's chuck key leash is made of durable rubber. Resists cracking and breaking. Attaches to chuck key to drill cord. Fits most chuck keys and drill cords.