Take care. I bought these for my Worx Multicutter model 670. Well - they dont fit. And I got the reply that this specific Worx machine was not tested for compatability. Well. I just saw the review above and I am apparently not the only one with this problem.
I gave a worx multi tool and these blades don't fit it, the central hole is slightly to small on the blades to fit properly, I needed to purchase an adaptor to usw the blades