Set includes 7 combination bit/extractors for removing screw/bolt sizes #5 or #6 (M3), #8 (M4), #10 or #12(M5),1/4in.M6),5/16 in. (M8), 3/8 in. (M10) and 1/2 in. (M12). Requires a 3/8 in. or larger reversible powerdrill.Includesplasticcase.#Drill bit AND