Snap swivels

[Duayne]

I always use a snap on my bass crank bait rods. Not a snap swivle but just a snap. You can find them right in the snap swivle section. Not only is it easy to change cranks quick, it also allows the bait to have more action. The ones I use come from Bass Pro and I've never had one come open on it's own. You can use a pretty small one and you can't hardly see the thing.
A mistake I make, and will probably contiinue to make, is not retying the snap often enough. While it is easy to change baits, the line at the knot can get worn just like any other tied on bait. I'm usually good for a "cast off" or two with every week long trip.

[SLP]

I have always believed that swivels negatively affected the action of lures. The exceptions would be spinners, I have always used a swivel when casting a spinner.

[nlex104]

I always use them with crankbaits, I don't think it makes a bit of difference in how the crankbait runs.

[HURRICANEBOB]

My experience is big bill deep diver cranks it doesn't affect. But long slender narrow shallow running lures, I've seen an impact on how the lures run.

Size matters too. Take a little 2 inch prop bait and a big swivel, vs. big Redfin with a small swivel. Weight of the swivel has it's own impact to different degrees.

[fishalltime]

I have bought baits that had a snap on them right out of the package ,so appearantly the manufacturer did'nt think it affected it's action in a neg way.I guess a person could take them off.

[killroy1221]

I hate using snap swivels for fishin. I like using really fine wire snaps. They make them now that are really thin and are still rated at 15 and up to 40 lbs. I have even used them jig fishing for smallies in clear water with no ill effects. I use them mainly in creeks and when fishing with 8lbs test or less. I never use them when the ability or need to "HAUL ON 'EM" is a factor. Some lures can even go without the nose split ring if you use a snap. I have taken off the nose ring on countdowns while trout fishing and then used a snap when bass fishing. Worked fine. Handy on a kayak when re-tying is a problem.