Because I don't do many "remodel lights" I don't want to spend the money on one of those plastic bowl dust catcher/hole saw kits, so I just take the plastic bag the recess can comes in and poke a small hole in the end, then I put the arbor shaft of the hole saw through it, put it on the drill, then tape the large end of the bag to the celling to catch all the dust. Drill the hole fold up the bag and dump it out in the trash can. It works surprisingly well, and it is one less thing to take up space on the truck.