This was a great bit for a rush project but the buyer should beware of the ring holding the top two bearings , it's just an interference fit. with this sad one you can imagine that the small ring will loosen at some point. The press fit is not tight and after 5 minutes of use the ring flew off and the bearings came loose. Luckily I noticed this before it ruined a play I wasn't working on, otherwise this review would have been a lot more negative. I knew this from watching the beat when I got it, but I didn't have a lot of options so I gave it a try. The bit is VERY sharp and cuts through materials easily, but I don't know how long it will stay sharp. Overall a good priced product but you get what you pay for.
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