1/4" Drive Sizes: T10, T15, T20, T25, T27 and T30 3/8" Drive Sizes: T40, T45, T47, T50, T55 ... and T60 14 STAR DRIVER BITS MODEL:WT04458One 3/8" female to 1/4" male adaptor plus 2 bonus storage rails ... . Hardened alloy steel bits. Professional sand finish. 1/4" Drive Sizes: T10, T15, T20, T25, T27 and ... me.Thanks for visiting our website!! 14 PCS 3/8" & 1/4" DR IMPACT STAR BIT SOCKETS E-TORX TORQUE ...