Tsunami Black Interlock Swivel

Overview

The Tsunami Black Interlock Snap Swivels are a two-part terminal tackle component pairing a traditional barrel swivel with a secure interlocking snap. The barrel swivel connects via a ring to a flat plate housing snap, allowing free rotation while the snap wire locks securely into place for a stronger closure than a basic open snap.

Finished in black rather than bright silver, these swivels are designed to be less visually conspicuous within sea rigs. Tsunami describes the range as suitable for light through to medium-heavy fishing in both fresh and saltwater, giving UK sea anglers a versatile connector across a range of breaking strains.

Perfect For

Tsunami specifically highlights mainline-to-leader connections, quick lure changes and the ends of wire traces as key uses for this snap swivel. In practical UK sea fishing terms, that translates to attaching pre-made rigs, swapping traces between sessions, connecting certain leads or terminal assemblies, and changing lures quickly without retying your line.

The lighter sizes (6 and 8, both rated 35lb) suit light tackle and lure fishing with lighter traces, while the 52lb sizes 2 and 4 cover general-purpose sea rigs and larger terminal tackle. Size 1 at 72lb is aimed at heavier-duty connections. These are not intended as a dedicated power-casting lead clip for hard pendulum or beach casting.

Technical Insight

The barrel swivel element allows the terminal end to rotate freely, helping to prevent line twist building up during a session, particularly useful when running spinning lures or baited traces that naturally cause rotation. The interlock snap's flat plate housing captures the snap wire more securely than a simple open snap, reducing the risk of accidental opening under load while still allowing a tool-free change of rig, trace or lure.

With five verified sizes and breaking strains ranging from 35lb up to 72lb, and pack quantities from 8 to 18 pieces depending on size, anglers can match the swivel strength to the job at hand rather than over- or under-gunning their terminal connection.