The Fish Fighter™ Sinker Gauge was designed to help you easily sort your smaller cannonball-style round lead weights from .5oz all the way up to 6oz. It’s easy to use — just find the hole size that closest fits your sinker, and you will quickly know what weight sinker you have. This is an absolute must-have for any serious fisherman who wants to know exactly what sinker weight they are using. Made from marine-grade stainless steel, this sizing gauge will last through decades of use. This product also carries the Fish Fighter™ 100% Money-back guarantee.