8 Sizes for All Needs Choose between eight different combination spanners. Sizes range from 8, 9, 10, 12, 14, 17, 19, 22mm. Dropped Steel Build Made from a drop forged technique, these tools are made to be highly durable. Drop forging methods use hammering hot metal into dies and form the tool from there. This provides extra strength and durability. Polished and Chrome Plated High quality polish and chrome plating ensures their shine will not fade and keep a tight grip.