Serious about offshore fishing for tuna, mahi, or other pelagics? These KingKiller trolling heads are a classic for a reason. This 4-pack gives you bullet-shaped heads made from super tough TPU rubber that can take a beating. They're 2.3 inches long (59mm) and weigh about 0.3oz each. The large center hole fits heavy leader up to 400lb, and they're designed to easily pair with most 4-inch to 6-inch rubber squid skirts to create your own custom trolling lures. They come with cool 3D holographic eyes for extra attraction. Building your own lures with these heads is a cost-effective way to stock your tackle box with proven, high-quality trolling gear. Just add a skirt, hook, and leader, and you're ready to hook up!