Diablo's new, high performance hole saws deliver faster cutting performance and increased productivity. Unlike anything on the market, Diablo's hole saw system and mandrel design simplify the attachment process for fast and efficient hole saw mounting. The Adapter Nuts allow users to convert their existing holesaws to the Snap-Lock Plus system; 1/2" thread Adaptor Nut fits hole saws from 9/16" to 1-3/16" diameters, and the 5/8" thread Adaptor Nut fits hole saws from 1-1/4" to 6" diameters.