DEWALT® DWADTQTR5SET impact ready 5pc drill tap set 1/4" capacity features a 1/4" hex shank for use in impact drivers. This item allows you to drill, tap, and countersink all in one step; capable of working with up to 1/4" thick material capacity. Commonly used by elevator installers, mechanicals, electricians, glaziers. Includes: (1) 8-32 unc, (1) 10-24 unc, (1) 10-32 unf, (1) 12-24 unc, (1) 1/4"-20 unc.