I bought this item to cut holes in my conference table at work. I needed a 90mm hole saw to match the diameter of the inserts I was adding to the table. I don't expect to ever use this hole saw again. She could cut 4 holes in a 1" board of MDF. It cut fairly cleanly, and a small spring helped push the prybar out of the saw. It took some time and considerable pressure to make the cuts, and there were strong ones Burning Odor I would not recommend this item for multiple uses, but I would recommend it for single or occasional use.