13 Piece 1/2" Square Drive., Quick Releasing Chuck & 11mm-7/16" Hex Bit Set. Contents: 1pc. 1/2" Square Drive, 7/16" Hex. Quick Releasing Chuck. 6pcs 11mm-7/16" Hex Internal Torx bits: T30, T40, T45, T50, T55, T60 6pcs 11mm-7/16" Hex Hexagon Driver: 6mm, 8mm, 10mm, 12mm, 14mm, 17mm Packaging: Blow-Mold Case