I had some weight plates that had a slightly undersized hole for my barbell. This bit did a pretty good job enlarging them from 26-27 mm up the required 28mm. I did about 15 plates, some just slightly reaming the hole, but 5 of them required significant drilling of about 5 minutes per plate. The bit worked well in my drill press for smaller plates, hand drill for large plates. Did not use the pilot bit, just the outer hole saw portion. Now that I am done, the bit shows significant wear and cuts more slowly. I used cutting oil for the cuts. The bit was well worth the purchase price for my application, but if you have many holes to cut, there might be a better product.
Rating:
[5 of 5 Stars!]