I used this product to cut down four medium size bushes at the front of my house. The first two bushes the product worked great. On the third bush the chain came off. I replaced the chain, after getting oil all over my shorts, since the oil well is on the bottom when you work with the chain. I used the product for about three minutes and it threw the chain again. I continued to put the chain on six times until I just quit and will just dig the rest of the bushes out by hand. I am not happy with this product and I don't have time to stop and fix the chain every three minutes.