The AFTCO Ike Jime Spike is the perfect tool to euthanize your catch before it experiences full suffocation. This prevents the brain from sending signals to the rest of the body, excreting cortisol and adrenaline. Both hormones have detrimental effects on the quality of the meat. The sooner a fish can be spiked, the better its meat will be. Made from marine grade 316 stainless steel, the 4-inch spike is perfect for gamefish of all sizes and will not rust.