Package Included: 1 pc 4-1/8 inch hole saw, 1 pc matching dust bowl, 1 pc arbor, 1 pc replacement drill bit, 1 pc hex key,1 pair of gloves Sharp and Durable: This hole saw is of bi-metal construction with high speed steel saw teeth and special flexible steel saw body for longer life and sharper edges; Made of quality plastic, this dust bowl is heat-resistant and wear-resistant for continuous use Less Mess - 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 wood, plywood, pipe, soft plaster and plastic, enough for the average DIYer 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 shihan-xingyu bi-metal hole saws, not for any type of hole saws from other brands; The hole saw can't drill hole in glass ceramic concrete Dust Collection and Mess Free: Hole saw built-in dust collection bowl is a lifesaver. Dust bowl catches the majority of dust and debris. It kept the work area surprisingly clean, saving you tons of time on cleanup. Plus no more dust in the eyes and junk in your hair when drilling overhead. for remodeling, renovating, or upgrading a home. Hole saw to cut precise such as installing recessed lights, can lights, ceiling lights, corn hole boards, speakers, vents, wiring, and other fixtures.