Question about BGS Jeu de douilles Gear Lock | 12,5 mm (1/2") | 19 pièces

The product is suitable for both metric and imperial sizes. It contains both metric spanner sizes (e.g. SW 8 to 32 mm) and inch sizes (e.g. 5/16" to 1-1/4") and can therefore be used for both systems. If you specifically need inch sizes, this product is suitable.