This cutter has proven itself. I've only used it a few times so I don't know how long it will stay sharp. One of the biggest disadvantages is the rather short shaft length. After I put it in my router used with a router table, the blade barely cleared the table. I had to put the bit back in so it was only halfway in the collet, which made me nervous. It worked, but I didn't like that insecure attitude.
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