
Diamond Wind-On Swivels
Diamond Wind-On Swivels pass through rod guides cleanly for wind-on leader connections. Originally commercial-only hardware, now available to recreational anglers. Outrageous strength in a tiny package. Four sizes: 150, 300, 400, and 500 lb. Sold in 5-count boxes. Browse our terminal tackle.
- Passes through rod guides
- Originally commercial-grade hardware
- Four sizes: 150, 300, 400, 500 lb
- 5 per box
- Tiny profile, massive strength
Commercial-Grade Hardware That Passes Through Guides
Wind-on leaders need a swivel small enough to pass through rod guides and strong enough to not be the weakest link. Standard swivels are either too bulky to pass through or too small to hold heavy fish. Diamond Wind-On Swivels solve both problems.
These were originally commercial-grade hardware, unavailable to recreational anglers. The profile is small enough to clear standard rod guides. The strength ranges from 150 lb to 500 lb. When you connect a wind-on leader, this swivel is the critical junction between your main line and leader. It has to be strong, compact, and smooth. Diamond got all three right.
These were originally commercial-grade hardware, unavailable to recreational anglers. The profile is small enough to clear standard rod guides. The strength ranges from 150 lb to 500 lb. When you connect a wind-on leader, this swivel is the critical junction between your main line and leader. It has to be strong, compact, and smooth. Diamond got all three right.
Passes Through Rod Guides
The compact profile clears standard rod guides cleanly during the wind-on process. No catching, no snagging, no hesitation. This is the whole point of a wind-on system and the swivel cannot be the bottleneck.
Commercial Heritage
These were designed for commercial fishing operations where gear failure means lost income. The materials and construction meet commercial standards. Now available to recreational anglers who want the same reliability.
Four Heavy-Duty Sizes
150 lb for standard offshore leaders. 300 lb for heavy trolling. 400 lb for big game. 500 lb for giant tuna and marlin. All four sizes maintain the small profile needed for guide passage.
More Terminal Tackle
How to Rig a Wind-On Leader
1. Attach the wind-on swivel to the end of your main line via loop-to-loop or knot
2. Crimp or tie the leader material to the other side of the swivel
3. Verify the swivel passes through your rod guides smoothly
4. Wind in until the leader connection is on the reel for storage
5. When a fish is hooked, wind the leader through the guides
6. The leader extends from the rod tip for handling the fish at boatside
Specs & Common Questions
Everything you need to know before you buy
Full Specifications +
| Brand | Diamond Fishing |
| Type | Wind-On Swivels |
| Material | Commercial-grade hardware |
| Sizes | 150, 300, 400, 500 lb |
| Pack Size | 5 per box |
| Profile | Passes through rod guides |
| Origin | Originally commercial-only |
| Price Range | $9.99 - $10.99 |
Will these pass through my rod guides? +
Yes. These are specifically designed for wind-on leader systems where the connection must pass through standard rod guides. The compact profile clears most guide frames cleanly. See our leader FAQ.
What size for tuna leaders? +
300 lb for yellowfin and smaller bluefin. 400-500 lb for giant bluefin and large marlin. Match the swivel to your leader class. See our tuna fishing guide.
How do I attach a wind-on leader? +
The wind-on leader is loop-to-loop connected at this swivel. One side ties to your main line via a loop, the other side connects to the leader. See our leader crimping guide and Albright knot guide.
What were these originally made for? +
Commercial longline and tuna fishing operations. The strength-to-size ratio was developed for professionals who cannot afford equipment failure. Now available for recreational use. Browse our terminal tackle.
Can I use these for standard leader connections? +
You can, but they are designed and priced for wind-on systems. For standard swivel connections, check our Diamond Ball Bearing Snap Swivels or swivels guide.
Why are they sold in 5-packs? +
Most anglers pre-rig multiple wind-on leaders. Five gives you enough for a set of leaders with a spare. At $9.99-$10.99 per 5-pack, the per-swivel cost is reasonable for commercial-grade hardware. See our leader weight chart.



