Bosch socket wrench set Impact Control 7-pieceSet contents:Length: 40 mm, 5 socket wrench inserts: SW13 / SW17 / SW19 / SW21 / SW24. 1 adapter 1/2 inch to 1/4 inch. 1 adapter 1/4 inch to 1/2 inch. Robust socket wrench insert in accordance with ISO 2725-1 for hexagon screws. High-performance screw tools made of special melt steel. Manufactured using the hot forging process, resulting in maximum material compaction and excellent degrees of hardness. High material toughness and long service life.