The Jacobs® Plain Bearing chuck is the world’s most widely used for medium or heavy duty portable, bench, or floor mounted power tools. This industrial quality chuck, with fully hardened and ground working components, offers exceptionally high accuracy, gripping power and durability. For use on threaded and taper mounted spindles.

• Bearing Type: Plain
• Chuck Model:  31090
• Max Capacity: 3/8"
• Sleeve Finish: Fluted
• Chuck Key: K30
• Chuck Mount: 1/2"- 20