Package Included: 1 pc 60mm hole saw, 1 pc 80mm hole saw, 1 pc matching dust bowl, 1 pc arbor, 1 pc replacement drill bit, 1 pc hex key and : This hole saw is of bi-metal construction with high speed steel saw teeth and special flexible steel saw body for longer life and edges; Made of quality plastic, this dust bowl is heat-resistant and wear-resistant for continuous use Less Mess - Easy Cleanup: Designed for drilling holes in ceiling drywall or plasterboard, this hole saw dust bowl blocks and collects over 95% of dust, keep dust from falling on your body or on the ground Wide Application: This kit can also be used extensively for cutting thin metal, wood, plywood, pipe, soft plaster and plastic, enough for the average as well as professional projects Easy to Use: First assemble the hole saw, then insert the hole saw arbor into the round hole in the center of the dust bowl, and finally insert the hole saw arbor into the electric drill Attention: The dust bowl is only for bi-metal