These Flat Wood Bits Are Great For Drilling Holes For Cable Or Wire Installations. They Are Also Excellent For Installing Doorknob And Deadbolt Hardware, Or Even Drilling A Hole For A "peep Hole" In Your Front Door. No Matter What Your Need To Drill A Hole In Wood, This Set Of Drill Bits Will Have You Covered. They Even Come In A Vinyl Pouch To Keep Them Organized And Extra Sharp. 6 Pieces In The Set Si Zes 3/8" To 7/8" Sizes Clearly Marked Complete With Vinyl Pouch Compatible With Power Drills