Metric and inch set, 1/4" and 3/8" square drive loosens up to 85% rounded fasteners.
39 Piece Set contents:
9x metric sockets 1/4" drive 4 - 12mm.
9x inch sockets 1/4" drive 3/16 - 1/2 ".
9x metric sockets 3/8" drive 8 - 19mm.
7x inch sockets 3/8" drive 3/8 - 3/4".
5x accessories.