Single-body wrench with head on both ends whose interior has twelve faces, that is, in the form of a hexagonal-duo (Machine-translation by Google Translate, not legally binding)

摘要

Single-body tool wrench with head on both ends whose interior has twelve faces, that is to say in a duo-hexagonal shape characterized in that the handle thereof has a crankshaft shape with elbows respectively on whose ends the heads with twelve-sided incisions are disposed. Duo-hexagonal shape arranging each head of a different diameter than the other. (Machine-translation by Google Translate, not legally binding)