When I received the product, it was used. It wasn't clean. There was a lot of dirt and grime in the packaging but I thought maybe a 2" would fit and maybe I could use it to do the project I needed. I couldn't get it. The guide nozzle fell out as soon as I took it out of the case I tried walking through a tree - soft jaws - and there is a way to use it without a guide nozzle, but it's more difficult. But just passing a test piece of wood would melt the teeth until it was flat and couldn't cut anything through. The smaller ones worked better so the larger ones probably got the heat treated wrong. But they barely cut through the wood and leave such a jagged edge that I can't use them for the project I bought them for - they come back because they arrived worn out and because the teeth can't even handle soft wood.