Snaps and snap-swivels make it easy to clip lures to your line. They provide better lure action than a rigid knot. They keep line from fraying at lure-tie points. And while there are many types of each, all you really need is a snap. The more hardware you have on your rig, the less likely a fish is to bite. Swivels are great with in-line spinners, which twist lighter lines, and some trolling rigs. Otherwise, stick to one of these:
A. Duo-Lock Snap
PROS: Easy to open and close. Rounded profile gives good lure action.
CONS: Will occasionally open on its own as you’re fighting a fish.
TIP: Bend the hooked closure slightly rearward. This makes the snap harder to open but less likely to pop open.
BEST FOR: Ultralight to light freshwater.
B. Coastlock Snap
PROS: Wide size range. Easy to fasten.
CONS: Hard to insert in some recessed lure eyes.
TIP: Occasionally, there will be a sharp edge or burr on the end of the wire. Be sure to smooth it away.
BEST FOR: Inshore saltwater.
C. Hooked Snap
PROS: Easy to use. Clever design.
CONS: Hard to find in stores. Midrange strength.
TIP: Don’t open this snap farther than you need to. Repeated bending will weaken the wire.
BEST FOR: Light to midweight freshwater.
D. Fastlink Snap
PROS: Fairly weedless.
CONS: Limited size range. Difficult to impossible to use with recessed lure-tie points.
TIP: There’s no opening or closing this snap. Slip the eye under the clip and pull to fasten.
BEST FOR: Surfcasting.
E. Cross-Lok Snap
PROS: Extreme strength.
CONS: Difficult to fit through smaller hook or lure eyes.
TIP: To close it, make sure it’s hooked securely on the uppermost part of the wire and not just on the lower part.
BEST FOR: Heavy lines, strong tackle.