I’ve used several different tungsten brands over the years that have an odd, almost angular-type shape towards the bottom of the weight. This pronounced flare, in my opinion, can make fishing wood a bit difficult at times. It seemed like they got stuck in the forks more often than rounder-bodied tungsten, which constantly left me popping my life in a desperate attempt to free my bait.
I really like the shape of these weights, though. They “fit” flipping and pitching baits wonderfully and they come through wood very well. I’ve put ’em in the gnarliest wood I can find and they come through with ease. Efficiency certainly hasn’t been an issue throughout my testing.