Stanley Tools For The Mechanic 14 Piece Combo Wrench SAE Set (576-85-990) 1 SetMaxi Drive allows 15% more torque to applied to the fastener and helps reduce fastener rounding Box end employs the Maxi Drive system, which allows the box end to contact the fastener away from the corner Opening Size = 3 8 in, 7 16 in, 1 2 in, 9 16 in, 5 8 in, 11 16 in, 3 4 in, 13 16 in, 7 8 in, 15 16 in, 1 in, 1 1 16 in, 1 1 8 in, 1 1 4 in, 3 8 in [Min], 1 1 4 in [Max] Opening Type = Open Box Includes = Pouch Organizer Handle Measuring System = Inch