The Jacobs No. 2A Keyed Drill Chuck accepts drill bits from 0 to 3/8 inch and mounts on a Morse No. 2 taper arbor. As a keyed chuck, it tightens with a chuck key to secure a positive grip for consistent bit retention during drilling. This No. 2A chuck is intended for machines and spindles that use Morse No. 2 tapers and standard 0–3/8 inch bits.
