I needed tool to go through plaster for a remodel project. After buying the high dollar plaster bit, I could only get about 3" until it burned the bit up. Not exactly what they advertise for this everything tool. I did try the tool on other materials and found it could only do a good job on drywall (a little more messy than a key hole saw). I think the tool is a rediscovered drywall tool with a nice handle. A case for the tool would have been nice so when I toss it to the side it dosen't get damaged under the building material that I cut with a real saw.