One advantage that it had over other polearms was that while it had the stopping power of a spear and the power of an axe, it also had the addition of a pronounced hook. If the sheer power of a swing did not fell the horse or its rider, the bill's hook was excellent at finding a chink in the plate armour of cavalrymen at the time, dragging the unlucky horseman off his mount to be finished off with either a sword, spear or the bill itself. These characteristics also made it effective against heavily armoured infantry, dragging them into the melee or exploiting the weak points in their armour.