LFA/Reichel Hardware 43B-5B-1/2-20 1/16-1/2-1.5-13 mm Capacity 1/2-20" Threaded Mount Keyed Heavy Duty Drill Chuck LFA Industries Plain Bearing Heavy Duty Keyed Drill Chuck All Steel Chuck T5/K32 Key Included Manufactured To Last - Quality and Excellence - Chucknology Made in France over 85 Years