Jacobs 6208D Medium Duty Plain Bearing Drill Chuck – 1/4" Capacity, 3/8"-24 Taper ShankThe Jacobs 6208D Medium Duty Plain Bearing Drill Chuck delivers reliable performance and durability for precision drilling applications. With a capacity of 0. 040"0. 250" (up to 1 4") and a 3 8" 24 taper shank, this chuck is designed for machinists, toolmakers, and technicians who require accuracy and repeatability. Built by APEX Tools under the Jacobs brand and remains highly sought after for its precision and robust design in both industrial and