LFA Industries 45-6A-3JT 3/16-3/4-0.5-20mm Capacity, 3 Jacobs Taper Mount Plain Bearing Precision, Keyed Drill Chuck LFA Industries 45-6A-3JT Plain Bearing Precision Crafted Heavy Duty Keyed Drill Chuck All Steel, Keyed Drill Chuck with T6/K3 Chuck Key Included LFA Industries 45-6A-3JT 3/16-3/4-.5-20 mm Capacity, 3 Jacobs Taper Mount Manufactured To Last-For Quality and Excellence-Chucknology Made in France over 85 Years