COG stands for Centre of Gravity, which is a reference to the unique way that the hook link is attached to the heaviest part of the lead, giving instant, unparalleled hooking. Put simply, this system has been designed to convert more pick-ups into fish on the bank.When to use it then? Well, it’s best used over firm lake beds like gravel, sand and firm silt, rather than weed, when you’re better to reach for the Heli-Safe system. It can be cast every bit as far as a normal lead clip system, although when going for extreme range, it’s worth dispensing with any PVA bags as the impact could force the half-swivel out of the lead. For margin work and placing from boats, the COG is simply unrivalled. Initially, there are just two lead shapes available, flat pear and distance, which should cover you for most fishing situations. The flat pear version is best used for closer range, lowering or dropping from a boat, whereas the distance version is the one to reach for if you’re having to go long for your fish. One point well worth noting is that the COG boom sections are numbered (on the swivel) because it’s essential that they are used with the correct lead. If you use the wrong boom with the wrong lead, the setup simply won’t work as intended.