Features and Benefits S2 High Alloy Steel bits, the strongest hardest bits available 4 Phillips and 4 flat tip 5/16" shank bits Heat treated, R/C 56-62 Comes in a plastic holderHigh quality drive bits fit virtually all hand impact drive tools. Includes the following: Flat Tip bit, 1/4” x .040, 5/16” hex; ....(more info)