Titan Tools 16135 Tamper Resistant SAE Hex Bit Socket Set - 13 Piece S2 alloy steel bits for strength and durability For use with pin type tamper resistant hex fasteners 1/4" and 3/8" drive bit holders 11 bits: 1/16", 3/32", 1/8", 9/64", 5/32", 3/16", 7/32", 1/4", 5/16", 3/8" and 7/16" Handy magnetic holder sticks to most metal surfaces