Flextorq, 9 piece, impact driver bit set, set includes: 6" locking bit holder, 3" locking bit holder, 1/4" x 1-7/8" compact nut driver, 5/16" x 1-7/8" compact nut driver, (5) 1" bit tips, the locking bit holder, with quick change mechanism, magnetism , accepts both 1" & 1/4" hex-shank accessories, compact nut drivers for accessibility, magnetism for fastener retention, engineered for use in impact drivers, typical applications include wood & metal.