I bought a 5 pack of #4's for $8.00, pretty pricey.
Put them on the rear only of some lipless cranks and it seemed like every fish I caught after that was only hooked on the front treble which is a standard hook.
I kept thinking the hook was spinning away from the fish if it was bumped from the side, if you can understand that. I have since caught some on the rear hooks and have also lost a few on them. I have had one break but not at the part that spins, and they could be sharper. Over all, not impressed.
Buzz