TEKTON 3/8-Inch Drive Extra Long Star Bit Socket Set, T10 - T40, 7-Piece | 1352 Premium quality hardened S2 steel bits Precisely milled tips for exact fit in fastener High-strength chrome vanadium steel sockets with notched drive end lock onto drive tang Removable bit allows easy repair or replacement if worn or damaged 7-pc. 3/8 in. drive star bit sockets (6 inch): T10, T15, T20, T25, T27, T30, T40