So far, these are working very well. We've only switched out one blade and it seems to be lasting quite well. The process of switching them out is easy, as expected, and they are fit properly to the Craftsman utility knife, so they don't wobble when using the knife. Good luck finding what will work for your needs. We have found that the combination of these blades and the utility knife is a very good option and they are working very well.
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