SnapLock plus mandrel system. 1 size mandrel fits all Diablo hole saws from 5/8" to 6" diameter. Tool free plug ejection for fast material removal. 2-3/8" cutting depth for 40 percent deeper holes in 1 pass and increased productivity. For use in wood, nail embedded wood, plastic, aluminum, metal, cast iron and stainless steel. For clean cuts in any wood or composite.