Split your stack in two and thin your profile.  Great if you need a wide variety, or if you need to carry different types of tippet (Flouro and Mono).  If you build your leaders on stream, keep your even spools on one side and odds on the other - this makes blood knotting easy as you step down your build. 

This 2X Wide Quick-Wrap accessory is designed to wrap around and attach quickly to any utility bands on our packs and bags, but also works great on your wading belt, pack strap, boat frame, etc.  Includes clip-to points to secure your stacks, and a D-Ring in the middle for connection of your nippers.