Please don't use a drill. I promise the hole will not line up right. I ruined 3-4 props thinking I was a champion and didn't need no stinkin reamer. The hole was never the right size (too big no matter what bit I used since it is straight), and always drilled just crooked enough to where the prop didn't spin true. The reamer is tapered and makes the hole perfect EVERY time. Trust me on this, it's worth the $8.00