Review on Swordfish 32051 Brass Plated Assortment by Alex Pollard

I bought these to screw in the paddle lock on a boat. I drilled pilot holes and screwed in the screws. The head fell off before the last corner. In the process, he also broke off the head of another screw holding the rudder lock. Now I have a boat that needs propellers right where the other two propellers are. I can't drill out the other screws because that would widen the holes too far to fit future screws. It's a small thing, but that's why I can't row my rowboat now. 3 years building boat and now it's ruined. or at least I've been fixing it for a year now.Thanks to cheap Chinese screws.