In experienced hands, paralyzer tips produce devastating results.Upon impact with prey, the splayed spines of the Paralyzer Tip spread out and firmly hold prey. This tip is designed for use with any of the spears that we offer that have a 6mm end piece. Spines can be sharpened as needed. Spring steel with 6mm threads.Key FeaturesSpring steel spines spread upon impactSpines can be sharpenedFits to spears with 6mm end piece