Seems pretty solid. Earlier I added recessed lights. There is 1 cutting blade on one end and balancers can be added on the other end depending on how big the hole you need. I had to make 4" holes and when cutting I have to be careful not to apply too much pressure and try to keep the drill straight and straight to ensure a clean cut. When cutting, the dust collector perfectly collected dust, and I made 6 holes without any problems. My next project is installing ceiling speakers that require a 9" hole, so I'm hoping this drill will work as well as my previous lighting setup. I think this is a well made hole saw. All the details appear to be well done and stand the test of time. My only complaint is that they should have had 2 cutting blades on both ends instead of 1 so the balance bars that come with this tool are not necessary and while this saw did its job of cutting a clean hole I think this does the case would be easier to cut the hole with 2 blades. Overall I like this tool and would recommend buying it for downlight or ceiling speaker installations for quick, precise hole cutting without the mess.