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Nytro Free Running Swivel Blocker

£1.69

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You are just £80.00 away from Free Mainland UK Delivery!

Anglers Serving Anglers

Our entire team at Gerry’s are all experienced anglers and can help you choose the correct tackle for any fishing situation. Please drop us a message or give us a call if you need any help.

You can return unused standard items within 30 days for exchange or refund.

We check our prices weekly to ensure we can combine our fabulous service with the best prices. If you find an item cheaper and in stock somewhere else, drop us a a message in the chat box and we can see what we can do. 

This item is available for next day delivery. You can pick this in the checkout.

We offer free post to any mainland UK address with a basket of more than £80. We also send all over the world and the best way to find out how much postage you will pay is in our checkout. Add the items to your basket and then add your address. Our checkout will automatically calculate your total.

We have come from a tiny fishing store and grown into one of the biggest fishing tackle retailers in the UK winning countless awards over the years. We are still a family business offer fabulous service online and in-store.

Spread the cost of larger orders over 6 or 12 month 0% APR. We also offer longer terms with APR charges via V12 finance. Available in the checkout.

You can make your next purchase a little easier on the wallet by splitting the total into 3 payments by using Klarna payments in the checkout.

SKU – NYT5846058

Product Details and Uses

Nytro Free Running Swivel Blocker

Tangles are the absolute enemy of efficient feeder fishing. If your rig is constantly wrapping around itself, you aren’t fishing—you’re just wasting time. The Nytro Free Running Swivel Blocker is a precision-engineered solution designed to create the cleanest, most effective running rig possible.

The “secret sauce” of this blocker is its internal bore, which is specifically shaped to allow you to pull your connection knot inside the bead. When paired with a “twizzled” length of line, it creates a natural boom that kicks your hooklength away from the feeder, ensuring a perfect presentation on every single cast.


Key Features & Benefits

  • Natural Boom Effect: The elongated shape and rigid grip allow you to bury the knot inside the blocker, creating a stiffened “arm” that keeps your hooklength clear of the feeder.

  • Exceptional Line Grip: Made from a high-friction rubber compound that stays put on both monofilament and “slick” braided mainlines.

  • Knot Protection: By housing the knot inside the bead, you protect your most vulnerable point from the constant impact of a sliding feeder or bead.

  • Two Precision Sizes: Available in Medium and Large to suit everything from finesse silverfish setups to heavy-duty distance casting.

  • Eco-Friendly Wire Dispenser: Supplied on wire loops for instant, “no-fumble” application. Just slide it on and you’re ready to fish.


Technical Specifications

Feature Specification
Model Nytro Free Running Swivel Blocker
Sizes Available Medium / Large
Material High-Density Impact-Resistant Rubber
Application Running Feeder Rigs / Natural Booms
Compatibility Braid, Monofilament, and Fluorocarbon
Color Discreet Low-Viz Brown
Packaging Reduced Plastic / Planet-Friendly

Where to Use Nytro Swivel Blockers

  • Distance Feeder Fishing: Essential when using heavy bullet or window feeders. The blocker absorbs the shock of the cast and keeps the rig streamlined for maximum yardage.

  • River Fishing for Chub & Barbel: Use the Large size to create a robust running rig that won’t tangle in fast-moving water or heavy flows.

  • Commercial Carp Tactics: Perfect for “bomb and pellet” or open-end cage feeder work where you want a 100% free-running, fish-safe setup.

  • Braid-Mainline Rigs: The soft rubber construction is “braid-friendly,” ensuring your expensive mainline isn’t bruised or damaged by metal hardware.


Gerry’s Pro Tip

“At Gerry’s, we see a lot of guys struggling with tangles on the cast. Here is the ‘pro’ move with these blockers: once you’ve tied your swivel to your mainline, twist the last 4-5 inches of your line to create a ‘twizzled boom.’ Now, slide this Nytro Blocker down and firmly pull that knot right into the bottom of the bead. This locks the ‘boom’ in place and makes it point away from the feeder like a stiff arm. It’s the closest thing to a 100% tangle-proof rig you’ll ever find!”


Frequently Asked Questions

Q: Why would I pull the knot inside the blocker?

A: Two reasons. First, it protects the knot from being hit by the sliding feeder. Second, it creates a rigid connection that helps the line act like a “boom,” pushing your hooklength away from the feeder to prevent tangles.

Q: Medium or Large—which one do I need?

A: If you’re using light lines (0.20mm and under) or thin braids for silverfish, go for the Medium. If you’re using heavier gear for Carp or Barbel, or using large-eye swivels, the Large provides a more secure ‘stop’ and a bigger surface area for the feeder to sit against.

Q: Is this rig fish-safe?

A: Absolutely. This is a 100% free-running system. Because it is a blocker on the line rather than a fixed crimp, the feeder can slide off the end of the line in the event of a breakage, meeting the safety requirements of almost all UK fisheries.

Q: Will it work with any brand of feeder bead?

A: Yes. The flat top of the blocker is designed to sit perfectly flush against almost any sliding swivel or feeder bead on the market, including Nytro’s own Connex range.

Anglers Serving Anglers

Our entire team at Gerry’s are all experienced anglers and can help you choose the correct tackle for any fishing situation. Please drop us a message or give us a call if you need any help.

You can return unused standard items within 30 days for exchange or refund.

We check our prices weekly to ensure we can combine our fabulous service with the best prices. If you find an item cheaper and in stock somewhere else, drop us a a message in the chat box and we can see what we can do. 

This item is available for next day delivery. You can pick this in the checkout.

We offer free post to any mainland UK address with a basket of more than £80. We also send all over the world and the best way to find out how much postage you will pay is in our checkout. Add the items to your basket and then add your address. Our checkout will automatically calculate your total.

We have come from a tiny fishing store and grown into one of the biggest fishing tackle retailers in the UK winning countless awards over the years. We are still a family business offer fabulous service online and in-store.

Spread the cost of larger orders over 6 or 12 month 0% APR. We also offer longer terms with APR charges via V12 finance. Available in the checkout.

You can make your next purchase a little easier on the wallet by splitting the total into 3 payments by using Klarna payments in the checkout.

SKU – NYT5846058

Chest Size Guide

Penn Chest Size Guide

Small (36″-37″)

Medium (38″-40″)

Large (42″-44″)

XLarge (46″-48″)

XXLarge (50″-52″)

Wader Waist Guide

Small (28″-30″)

Medium (30″-33″)

Large (34″-37″)

XLarge (37″-39″)

XXLarge (39″-42″)

3XLarge (42″-45″)

Kinetic/Westin Chest Size Guide

Small (36″-37″)

Medium (38″-40″)

Large (42″-44″)

XLarge (46″-48″)

XXLarge (50″-52″)

3XLarge (54″-56″)

Grundens Chest Size Guide

Small (36″-37″)

Medium (38″-40″)

Large (42″-44″)

XLarge (46″-48″)

XXLarge (50″-52″)

3XLarge (54″-56″)

Vass Chest Size Guide

Small (36″-38″)

Medium (38″-41″)

Large (42″-44″)

XLarge (45″-46″)

XXLarge (47″-48″)

3XLarge (49″-51″)

Trakker Chest Size Guide

Small (38-40″)

Medium (41-43″)

Large (44-46″)

Xlarge (47-49″)

XXLarge (50-52″)

XXXLarge (53-55″)

Korda Chest Size Guide

Small (36″-38″)

Medium (38″-41″)

Large (42″-44″)

XLarge (45″-46″)

XXLarge (47″-48″)

3XLarge (49″-51″)

Guy Cotten Chest Size Guide

Small (86 – 94cm)

Medium (94 – 102cm)

Large (102 – 110cm)

XLarge (110 – 124cm)

XXLarge (124 – 134cm)

3XLarge (134 – 154cm)

Fox Chest Size Guide

Small (36″-38″)

Medium (39″-41″)

Large (42″-44″)

XLarge (45″-47″)

XXLarge (48″-50″)

3XLarge (51″-54″)

4XLarge (55″-60″)

Nash Chest Size Guide

Small (36″-38″)

Medium (39″-41″)

Large (42″-44″)

XLarge (45″-47″)

XXLarge (48″-50″)

3XLarge (51″-54″)

4XLarge (55″-60″)

Aqua Chest Size Guide

Small (38-40″)

Medium (41-43″)

Large (44-46″)

Xlarge (47-49″)

XXLarge (50-52″)

XXXLarge (53-55″)

Guru Chest Size Guide

Small (36″-38″)

Medium (38″-41″)

Large (42″-44″)

XLarge (45″-46″)

XXLarge (47″-48″)

3XLarge (49″-51″)

Preston Chest Innovations Size Guide

Small (36″-38″)

Medium (38″-41″)

Large (42″-44″)

XLarge (45″-46″)

XXLarge (47″-48″)

3XLarge (49″-51″)

Trouser Waist Guide (Inches) 

Small – 28″ – 32″

Medium 32″ – 34″

Large – 34″ – 36″

X-Large 36″ – 38″

XX-Large – 38″ – 42″

XXX-Large 42″ – 46″

XXXX-Large 46″ – 52″