LFA INDUSTRIES 83S-6A-3JT 0-1/2-Inch - .5-13 mm Capacity, 3 Jacobs Taper Mount Super Chuck Heavy Duty All Steel, Keyed Drill Chuck with Chuck Key Included Keyed Drill Chuck LFA Industries 83S-6A-3 Jacobs Taper Super Chuck with Teflon sliding ring for super holding and friction free movement 0-1/2-Inch-.5-13mm Capacity, 3 Jacobs Taper Chuck Key Included Made in France over 85 Years