I'm looking for a pretty simple (like for #6, 8, and 10 screws) drill bit/countersink kit of better quality than the 3 included in my Costco $29 megacombo set, but I would also like one that will let me me drill and countersink a 2-3 inch pilot hole. Most of the kits I see at the Borg only include shorter bits. But there are times when I've needed to attach something to a wall/stud using 2 1/2 or 3 inch screws, countersunk, and I need to drill a pilot hole through 3/4" ply, then wallboard, then another say 1-2 inches into the stud. I would think this would be a stock item for a contractor or someone who makes/installs built-ins, but I never seem to find this sort of thing. Any recommendations?