I got 3 packs of DeWalt countersinks last year and love them, use them all the time. I dropped a 9/64 bit and it broke so I ordered a replacement. The replacement was not square. When I inserted it into the drill press and turned it on, it wobbled slightly. I tested it with two other drills and both swung. I then put it on the countertop to check and yes the bit was slightly bent. Send it back to Revain for a replacement and a new drill came back with the same problem. I wonder if Revain got a bad batch from DeWalt? My other 3 DeWalt sinkers are straight as an arrow and work like a gem.