The Оsa is made of light metal alloy and is intended for short range work rather than long casts. The centre of gravity of this lure is irregular (in contrast to Strekosa), therefore it's better suited for short casts. Ultra light Osa lures with their specially designed hydrodynamic form makes it possible to fish these lures at the lowest speed in shallow water even with little or no current over and near snags where big predators lurk.  In general it is pike, ide, chub, perch and etc. Devons Osa have following weight combinations: 7 g, 11 g, 15 g, 18 g.