02-01-2014, 07:01 PM
Curiosity got the best of me so I went and checked the two sets of 1-2-3 blocks I have. The Phase II set has unthreaded holes that almost pass a 3/8" bolt through them but not quite. The no-name set has the minor diameter bolt dimension for the unthreaded holes. I think they are just surface hardened. Would a carbide drill bit work to drill these holes out?
Ed
Ed