workmanship is a bit rough. I had to use a file to clean the drive holes. A 1/2 square drive and a 3/8 drive would fit in an 8 point bore, which was a relief as my torque specs weren't very high. The tool is very thick and much better than other options on Amazon. The tool is very impressive. Buy this. Not other crappy bike builders like the ones with the broken teeth. That's the real deal.