This tool helps sort recoil springs as well as other types of firearm springs by pull weight so you can use the correct spring for your load. This tester comes with a digital scale. Use is simple, just insert spring on bolt, insert in tool, attach coupler and scale. Pull until proper compression is achieved. Tool is marked with a line at 1.625″ which is the Mil-Spec compression length of a 1911 recoil spring. Begining February 1, 2013, the Spring Tester will include the NEW adapter, Model #11539 to check mainsprings, firing pin springs etc.
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