| Brand | Jacobs |
|---|---|
| Manufacturer | Jacobs |
| MPN | 34-06 |
Check the listing for details. Jacobs Heavy Duty Plain Bearing Drill Chuck - 0.04"-1/2" Capacity-6JT Mount. Condition: New. Listed at 229.00 USD. Jacobs Heavy Duty Plain Bearing Drill Chuck -. In 1942, Jacobs® designed the Super Chuck, the first precision ball-bearing industrial Chuck. It's still widely used in various industrial machining applications.