Jacobs Drill Chucks are for sale by Bisco Tool. This Plain Bearing Jacobs Drill Chuck is Model 2A with a capacity of 0-3/8", 2JT Taper Mount. This Jacobs Chuck Model #6214 is an Industrial Quality Drill Chuck and comes with a K2 Key. Bisco sells Drill Chucks Cheap! Many styles of Keyless and Keyed Jacobs Chucks are for sale. Call the Sales Staff at Bisco Toll Free at 1-866-247-2635 for any drill chuck questions.