
Spro Power Swivels - Maximum Strength, Minimum Size
Spro Power Swivels deliver surprising strength in a tiny package. These black nickel brass swivels range from 50 lb to 550 lb test, yet the largest size is barely bigger than a standard #4 barrel swivel. Available in 5 or 10 packs, with a 50-count bulk option for the popular #4 (130 lb) size. Made in Japan for freshwater and saltwater use.
- Ultra-compact design with serious strength
- Black nickel brass construction
- 10 sizes from 50 lb to 550 lb test
- 5, 10, or 50 count packs
- Made in Japan for salt and freshwater
Why Compact Swivels Catch More Fish
Bulky terminal tackle spooks fish. The closer hardware gets to your bait, the more likely a wary tuna or wahoo will turn away at the last second. Spro Power Swivels solve that problem by packing heavy-duty strength into a tiny body that fish do not notice.
The #4 size at 130 lb is the most popular for a reason. It handles serious offshore trolling loads but disappears in the water column. Use it to connect wind-on leaders, attach lures, or join line-to-leader connections. Compare to the Spro Ball Bearing Swivel for free-spinning needs, the Spro Heavy Swivel for bigger profile applications, or the Spro Power Swivel Combo for 3-way connections.
The #4 size at 130 lb is the most popular for a reason. It handles serious offshore trolling loads but disappears in the water column. Use it to connect wind-on leaders, attach lures, or join line-to-leader connections. Compare to the Spro Ball Bearing Swivel for free-spinning needs, the Spro Heavy Swivel for bigger profile applications, or the Spro Power Swivel Combo for 3-way connections.
Ultra-Compact Profile
These swivels are dramatically smaller than their rated strength would suggest. A 550 lb Power Swivel is about the size of a 100 lb barrel swivel from other brands. Less visible hardware means more bites.
10 Strength Options
From 50 lb for light inshore work to 550 lb for heavy big game, there is a Power Swivel for every application. The 130 lb #4 is the go-to for general offshore trolling.
Bulk Pack Available
The #4 (130 lb) size comes in a 50-count pack for anglers and charter boats that go through swivels fast. That is enough to rig an entire season of trolling leaders at one shot.
How to Choose the Right Spro Power Swivel Size
1. Match swivel strength to your leader test - equal or slightly stronger
2. Use #8 (50 lb) to #6 (80 lb) for inshore and light nearshore
3. Use #5 (120 lb) to #4 (130 lb) for standard offshore trolling
4. Use #2 (230 lb) to #1 (330 lb) for heavy trolling and chunking
5. Use 1/0 (370 lb) to 2/0 (550 lb) for big game billfishing and sharks
6. Attach with a loop knot, crimp, or Palomar for best rotation
Specs & Common Questions
Everything you need to know before you buy
Full Specifications +
| Brand | Spro |
| Type | Power Barrel Swivel |
| Body Material | Brass |
| Finish | Black Nickel |
| Size Range | #8 (50 lb) to 2/0 (550 lb) |
| Pack Options | 5, 10, or 50 count |
| Profile | Ultra-Compact |
| Country of Origin | Japan |
How strong are Spro Power Swivels really? +
They are independently tested and rated accurately. The 2/0 handles 550 lbs. The compact size is misleading - these are serious swivels. Read our swivels guide for more on swivel strength ratings.
When should I use a ball bearing swivel instead? +
Use the Spro Ball Bearing Swivel for trolling with spinning lures that create line twist. Power Swivels work fine for live bait, dead bait, and connections that do not need free rotation under load.
What is the 50-count pack for? +
Charter boats and high-volume anglers who go through the #4 (130 lb) size regularly. It covers a full season of rigging at a better per-swivel price. See our swivel size chart for more.
Can I use these for freshwater? +
Yes. The black nickel finish and brass construction work in fresh or saltwater. The smaller sizes (#8, #7, #6) are popular for bass, walleye, and trout leaders. Browse our swivels guide for applications.
How does the Power Swivel compare to the Heavy Swivel? +
Power Swivels are more compact at similar strength ratings. The Spro Heavy Swivel has a more traditional barrel profile. Choose Power for stealth, Heavy for a standard look.
What about 3-way connections? +
Use the Spro Power Swivel Combo for 3-way setups like daisy chains, dropper rigs, and teaser connections. Same strength, three eyes.