8 Piece SAE Offset Box Wrench Set Chrome vanadium steel construction Chrome vanadium steel construction Drop forged 12-point box end Sizes: 1/4" x 5/16", 5/16" x 3/8", 3/8" x 7/16", 7/16" x 1/2", 1/2" x 9/16" Sizes: 5/8" x 11/16", 3/4" x 25/32", 13/16" x 7/8"