HMT VERSADRIVE COMBO SET, 7, F, 5/16,

Drill and Tap up to 15x faster than standard methods VersaDrive® TurboTip Impact drill bits are stepped tip bits that drill at twice the speed of standard bits without the need for pilot drilling while cutting a perfectly round hole. Turbocharge your drilling performance by using this revolutionary tool

Versadrive Combo Set, #7, #F, 5/16, 27/64 
TurboTip + 1/4, 5/16, 3/8, 1/2 Taps"