I was a little surprised by the price at first, but when it arrived I quickly understood why. Very high quality product with storage case and spare? Teeth. I have a smaller adjustable hole saw with a dust cover that I bought at one of the big hardware stores, but it only works up to six inches and isn't nearly as good as this one. I think it cost $30. This cost $90. Not the greatest value but I don't mind paying for quality.