Durable solid steel construction provides years of long life performance that will not deflect under pressure of drilling. With a hybrid flat hex set screw in the body, it provides a tight fit to withstand vibration but provides ease of replacement of set screw with use of common flat head screwdriver. 36-574 quick change arbor saves valuable time by allowing quick change of hole saw sizes without the need of tools and without having to remove the arbor from the chuck.