Combo kit containing 1 of each MSH14IS, MSH516IS, MSH38IS. Includes 4 impact-grade nut drivers. 1- each of the following MSH14IS, MSH516IS, MSH38IS. 1- Of each 1/4 hex shank in 2-inch length, 5/16 hex shank in 2-inch length & 3/8 hex shank in 2-inch length. Resists impact driver stress. Unbreakable floating magnet.