WORKPRO W022013A Short Arm Torx Key Set, 9 Piece Chrome-vanadium steel for rust-resistent strength Hinged case opens flat, making it easier to get wrenches in and out High visibility sizes marked on case for fast size selection Size: T10, T15, T20, T25, T27, T30, T40, T45 and T50 Ideal for electronics and other recessed applications