The last time I did this I bought a 6 inch hole saw and it was a bit small. Most recessed lights feature a 6.3 inch opening. I've seen a number of adjustable ones, and this one had a price and a garbage collection screen. I cut 15 holes in under 20 minutes! Cleaning was an easy task as you cut a hole and flip the drip tray into a dust and dirt bin. This tool does exactly what I need!