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Spro Heavy Swivel

Spro Heavy Swivel

Regular price $11.99 USD
Regular price Sale price $11.99 USD
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Spro Heavy Swivel - Big Game Strength in a Slim Profile

The Spro Heavy Swivel packs serious strength into a narrow body. Forged brass construction gives these swivels ratings of 150, 240, and 380 lb test while keeping a compact profile. The black nickel coating resists saltwater corrosion and stays non-reflective in the water. Made in Japan and sold in 5 packs, these are a go-to barrel swivel for heavy offshore rigging.
  • Forged brass body with slim profile
  • Black nickel corrosion-resistant finish
  • 3 sizes: 150, 240, 380 lb test
  • 5 swivels per pack
  • Made in Japan

Read our complete fishing swivels guide

Why the Slim Profile Matters

Heavy swivels are usually bulky. That extra metal creates drag in the water and can throw off the action of your lure or bait. The Spro Heavy Swivel is engineered with a narrow body that cuts through the water with minimal resistance while still handling loads up to 380 lbs.

The forged brass construction is key. Forging compresses the grain structure of the metal, making it stronger per unit of size than cast alternatives. That is how Spro keeps the profile slim without sacrificing strength. Compare this to the Spro Ball Bearing Swivel for trolling or the Spro Power Swivel for lighter applications.

Forged Brass Construction

Forging makes the brass denser and stronger than casting. This lets Spro build a swivel that is smaller than competitors at the same strength rating. Less bulk means less drag on your terminal tackle.

Black Nickel Finish

The non-reflective coating protects against saltwater corrosion and does not flash in the water. Your swivel stays low-profile near your bait where wary fish might inspect the connection.

Three Size Options

150 lb for standard offshore rigs and heavy inshore work. 240 lb for serious trolling and chunking setups. 380 lb for big game billfishing and shark rigs. All three maintain the same slim profile.

How to Choose Between Spro Swivel Models

1. Use Spro Heavy Swivels when you need high strength and a slim profile for barrel swivel connections

2. Use Spro Ball Bearing Swivels when you need free rotation under load (trolling)

3. Use Spro Power Swivels for compact, general-purpose connections

4. Use Spro Power Swivel Combos for 3-way connections on daisy chains and teasers

5. Match swivel strength to your main line or leader test

6. Replace any swivel that shows corrosion, stiffness, or a bent eye

Specs & Common Questions

Everything you need to know before you buy

Full Specifications +
Brand Spro
Type Heavy Barrel Swivel
Body Material Forged Brass
Finish Black Nickel
Size Range 150, 240, 380 lb test
Pack Quantity 5 per pack
Profile Slim / Narrow
Country of Origin Japan
What is the difference between the Spro Heavy and Spro Power Swivel? +
The Heavy Swivel is larger and rated higher (up to 380 lb). The Power Swivel is more compact and covers lighter to mid-range applications (50-550 lb). Choose based on your strength needs and profile preference.
When should I use a ball bearing swivel instead? +
Use the Spro Ball Bearing Swivel when you need free rotation under load, like trolling with spinning lures. Heavy Swivels are fine for live bait rigs and bottom fishing. See our swivels guide.
How many come in a pack? +
5 per pack in all three sizes. That is enough to rig several leaders or a full spread. Stock up on your most-used size. Browse our swivel sizing guide for help choosing.
Will these rust in saltwater? +
The forged brass and black nickel finish resist saltwater corrosion. Rinse with fresh water after each trip for maximum lifespan. Read our gear essentials guide for care tips.
What knot should I use with these swivels? +
A Palomar knot or improved clinch knot works well with these swivels. For heavier leaders, use a crimp connection. Our swivels guide covers attachment methods.
Are these good for dredge rigging? +
Yes, the 380 lb size handles dredge loads. For 3-way connections on teasers and chains, check the Spro Power Swivel Combo instead.