Diablo 9-piece hole saw kit features five (5) bi-metal hole saw cups, 1 snap-lock mandrel, 1 pilot drill bit and 2 adapter nuts (1/2" and 5/8") for Quick and easy hole saw cup replacement for optimal work performance. This new high-performance hole saw set delivers faster cutting performance and increased productivity compared to standard bi-metal hole saws. Unlike anything on the market, Diablo's hole saw and snap-lock plus mandrel system simplifies the installation process, allowing for fast and efficient hole saw installation. These radical new hole saws offer extreme cutting lengths to drill deeper holes in one pass, and tool-free plug ejection and variable tooth designs for faster cuts. 9-piece set includes: (1) 2-inch bi-metal hole saw, (1) 1-1/2-inch bi-metal hole saw, (1) 1-3/8-inch bi-metal hole saw, (1) 1-1/ 8" Bi-Metal Hole Saw, (1) 7/8"