I'm like both of the above swivels.. use the silver plain snap on hard body lures and the small black snap swivel on both hard body & blade spinners..
Don't have any trouble with either of them on the hard body lures, though I only use mono line for all my fishing.. even though mainly trout now days.
The swivels are great as it saves a lot of time changing lures and tying knots..
cheers
Adrian
This is the rig I used for beach fishing for Mulloway at Middleton, baits were strips of squid, squid heads, pilchards, small whole mullet, salmon trout & even salmon & mullets fillets because they're an oily fish..
cheers
Adrian