It cuts a decent reamed hole but the one I got is oversized in diameter by about 0.005-0.010mm. This may be fine if you need to ream a hole for a large dowel pin, but this is not a precision reamer for a 4mm diameter hole. There is also no designation etched on the shaft of the size of the sweep, which should be there. So this is now in my stash of oversized reamers (which are sometimes needed but not the reason I bought these).
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