Fishing Swivels and Snaps: Types and Sizes

By Spencer Hollis

What a swivel does and why snaps matter

Line twist can turn a smooth retrieve into a tangled mess, especially when you fish with lures that spin or wobble. A swivel is a small metal connector that sits between your main line and the rest of your rig. Its job is to let the line rotate freely without transferring that twist up the spool. The Minnesota DNR’s MinnAqua guide explains that a swivel keeps the line from being twisted as certain types of lures wiggle and twist through the water. Snap swivels add a quick-change clip to that swivel body, so you can swap lures in seconds without retying.

Types of swivels and snaps you’ll see

The New York State DEC’s freshwater fishing guide shows three common styles: a plain barrel swivel, a snap swivel, and a 3‑way swivel. Each has a specific place in a tackle box.

A barrel swivel is a simple, compact connector. The North Carolina Division of Marine Fisheries rigging guide uses a barrel swivel at the top of several saltwater rigs, including the bottom rig, flounder rig, and red drum rig. In those setups the barrel swivel joins the main line to a leader, letting the bait move naturally while stopping twist from climbing up the line. Freshwater anglers also use barrel swivels when they add a monofilament or fluorocarbon leader, as the New York guide recommends for line‑shy fish like trout.

A snap swivel combines a swivel with an interlocking snap. The Minnesota guide notes that one looped end of the swivel is tied to the end of the fishing line, and the lure is clipped or snapped to the other end loop while the center of the swivel twists. Snap swivels make frequent changes of lures easier. The New York guide adds that snap‑swivels are good for lures that twist line, such as spinners and spoons.

A 3‑way swivel, pictured in the New York guide, has three connection points instead of two, so one line can branch into two. The New York guide also recommends a ball bearing swivel with in-line spinners to avoid line twist.

Where swivels and snaps sit in a rig

Placement depends on what you want the hardware to do. In a classic bottom rig, the North Carolina guide describes a 14‑ to 16‑inch leader with a barrel swivel at the top and a snap swivel holding a pyramid or bank sinker at the bottom. That keeps the sinker on the bottom while the bait rides above it. The flounder rig uses a barrel swivel at the top of a 12‑ to 36‑inch leader, with an egg sinker sliding above a stop. The red drum rig also places a barrel swivel at the top, above an egg sinker and a circle hook.

For freshwater, the New York guide shows a simple bottom rig with an egg sinker on the main line, a swivel, and a 12- to 18-inch leader to the hook; the swivel keeps the sliding sinker away from the bait. When you cast spinners or spoons, you can tie a snap swivel directly to the end of your main line and clip the lure on. The Minnesota guide confirms that the lure is clipped to the free end of the snap swivel.

If you fish for toothy species like northern pike or pickerel, you’ll often add a metal leader. The Minnesota guide says anglers attach a metal leader to the end of their line next to the lure or bait because pike have many teeth that can cut line. The New York guide also recommends wire leaders for sharp‑toothed fish. A barrel swivel is the typical connector between the main line and that leader, as shown in the New York guide’s ice‑fishing tip where a barrel swivel connects the leader to the backing.

How to match swivel size to your line and lure

The Minnesota DNR guide states simply that swivel sizes should be matched to lure sizes: small swivels for small lures, larger swivels for bigger lures and rigs. Swivel packages carry the maker’s size and strength markings, so compare them with the line you use. For more on matching components, see our guide on how to match a rod, reel and line.

The trade‑off: when extra hardware works against you

Snap swivels are convenient, but they aren’t right for every lure. The New York guide cautions that snap‑swivels may keep other types of lures from moving as they were designed to through the water. The New York guide’s advice is to keep that in mind: use snap‑swivels where line twist is the problem, such as with spinners and spoons, and tie other lures directly to the line with a knot from our fishing knots guide.

Even when a snap swivel makes sense, close the snap completely after clipping on a lure and check it before you cast. The Missouri Department of Conservation’s introduction to fishing reminds anglers that you don’t need a garage full of equipment; a few well‑chosen swivels and snaps will cover most situations.

Knots for swivels and snaps

The improved clinch knot is a reliable choice for attaching swivels, snaps, hooks, and lures. The Missouri guide calls it strong and easy to tie, even with cold, wet fingers. The New York guide also teaches the Palomar knot for a hook, swivel or lure, and recommends it for braided line, which may break easily with a clinch knot. Its Palomar steps: double about 4 inches of line and pass it through the eye of the swivel or snap. Let the swivel hang and tie an overhand knot in the doubled line. Pull the loop far enough to pass it completely over the swivel, then hold the swivel and the line and pull the knot tight. Clip the excess line about 1/8 inch from the knot.

For a deeper look at knots for different situations, see our fishing knots guide.

Swivels, snaps, and leaders at a glance

The table below summarizes the main components, what they do, and where you’ll commonly find them, based on the state agency guides cited throughout this article.

Keeping gear simple and rules in mind

Fishing regulations, including license requirements, gear restrictions, and size and bag limits, vary by state and by body of water. The North Carolina Division of Marine Fisheries encourages anglers to check bag and size limits before heading out. Always consult your state wildlife agency’s current rules. The Missouri guide also reminds beginners that a few basic items will equip you nicely for your first outings, and that the end of your line is the scene of all the action.

For more on the hooks, sinkers, and other terminal tackle that work alongside swivels and snaps, browse our hooks and terminal tackle section. You’ll find detailed guides on hook sizes and types, sinker styles, and common fishing rigs that put these pieces together.

Frequently asked questions

Do I need a swivel for every fishing rig?

No. The state guides use swivels where they solve a problem: spinners and spoons that twist line, bottom rigs that join a leader to the main line, and wire leaders for toothy fish. For other rigs you can tie the line directly to the hook or lure.

Can I use a snap swivel with a crankbait?

You can, but the New York guide notes that snap‑swivels may keep some lures from moving as they were designed to. Many anglers prefer to tie crankbaits directly to preserve the lure’s action. Reserve snap swivels for lures that naturally twist, like in‑line spinners and spoons.

How do I pick the right size swivel?

The Minnesota DNR advises matching swivel size to lure size. Then check the size and strength markings on the swivel package against the line and fish you plan to use it with.

Ready to build your own rigs? Visit our hooks and terminal tackle page for more in‑depth guides on the components that finish your line.

Sources

• Minnesota DNR MinnAqua: Tackling Your Tackle Box
• Missouri Department of Conservation: An Introduction to Fishing
• North Carolina Division of Marine Fisheries: Hooks, Lines and Sinkers
• New York State DEC: I FISH NY Beginners’ Guide to Freshwater Fishing
• South Carolina DNR: A Beginner’s Guide to Fishing
• New York State DEC: Best Practices for Saltwater Fishing

About Spencer Hollis

Spencer puts together our beginner & family fishing guides, digging through specifications, manufacturer details and owner reviews so you don't have to.