The blades sold to me when I bought 10 didn't last very long, they tended to break when they shouldn't, the teeth weren't worn but they snapped very quickly . One of the blades had a pierced hole through it, I think they sell seconds or reel ends, I saved money buying the blades but they lasted about 1/3 of what they normally do. , a big loss for us and I wouldn't recommend buying them because you just don't know what you're getting,