Atoplee 4 in 1 Universal Chuck Key, Multi Universal Power and Hammer Drill Wrench Fit Drill Power Tool 1/4,3/8,1/2,5/8 inch Material: carbon steel, 100% quality and Brand new 4 Way Drill Chuck key Chuck Sizes: 9mm 11mm 12mm 12mm, Weight: 41g Color: Black, Polishing surface treatment Used for most electric drills and power tools