LFA Industries 84S-6A-3JT 0-5/8-Inch-.5-16mm Capacity, 3 Jacobs Taper Mount Super Chuck Heavy Duty All Steel, Keyed Drill Chuck with T6/K3 Chuck Key Included Keyed Drill Chuck LFA Industries 84S-6A-3 Jacobs Taper Super Chuck with Teflon sliding ring for super holding and friction free movement 0-5/8-Inch-.5-16 mm Capacity, 3 Jacobs Taper Mount Made in France over 85 Years