XtremepowerUS Metric MM Pro-Grade Allen Hex Bit Socket, 13-Piece Constructed of high-grade Chrome-vanadium alloy steel; chrome-mirror finish 1/4-Inch drive socket sizes - 2, 2.5, 3, 4, 5, 5.5, 6mm x Length 37mm 3/8-Inch drive -7, 8, 9, 10, 12mm x 48mm L 1/2-Inch drive - 14mm x 55mm L Secure-fit latched ABS carry and storage case