Diablo DHS4000 High Performance Hole Saw, 3/8 in Arbor, 2-3/8 in D Cutting, Bi-Metal Cutting Edge          Diablo new, high-performance hole saws deliver faster cutting performance and increased productivity. Unlike anything on the market, Diablo hole saw system and mandrel design simplify the attachment process for fast and efficient hole saw mounting. These radical new hole saws provide ultimate cutting length to bore deeper holes in a single pass, tool-free plug ejection and variable tooth design for faster cuts.