Lyman pro headspace gauges stand at the forefront of reloading tools, offering precision and reliability that exceeds industry standards. Made from corrosion-resistant stainless steel, these gauges are designed to resist rust and maintain their integrity over years of use. Drawing inspiration from our renowned Lyman pro die sets, these gauges feature flat sides to prevent rolling and O-rings that ensure a secure, non-slip grip during use. Perfect for measuring both maximum and minimum headspace, as well as maximum case length, these gauges are indispensable for fine-tuning your sizing dies for bottle neck cartridges, guaranteeing top-notch performance every time.