Ignore that, it doesn't work on here......
Not a fan of AI, but google search for COG link displayed this;
The Korda COG (Center of Gravity) lead system is a carp fishing setup designed for superior hooking by aligning the hook link with the lead's center of gravity, improving weight transfer for instant bite indication, and offering lead ejection like a standard lead clip. Setup involves using a specific COG lead with a matching Korda Boom and Lead Clip, attaching your hook link to the boom's swivel, and securing it with a pin for a fixed, highly effective bolt rig, or removing the pin for a running setup, using silicone tubing to cover and control retention.