Jacobs Drill Chucks are for sale by Bisco Tool. This Plain Bearing Jacobs Drill Chuck is Model 33KD with a capacity of 5/64-1/2", 33JT Taper Mount. This Jacobs Chuck Model #6281 is an Industrial Quality Drill Chuck and comes with a K32 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.