PRESTON IERTIA 520 REELDescription Preston Innovations Inertia Reel The Inertia reels are perfect for the angler that's constrained to a tight budget. These lower budget reels might be cheaper than Preston's more expensive reels, but they still incorporate the high quality name Preston reels are known for. The smallest in the range is the Inertia 320, this is the perfect reel for smaller casts of up to 40m. Ideal for light waggler work and snake lake fishing. The middle