Tom from SWISCO responded:
September 11, 2023
Thanks for reaching out to us! We actually took a block of wood out from our shop to test this out. After trying a few different sizes, I personally think a 3/8" drill bit will give you a good, tight fit. You can then secure the 21-148B in place using a 5/16" Allen wrench. |
Tom from SWISCO responded:
September 11, 2023
The 21-148B is in fact already discontinued. We're only going to sell these while supplies last, at which point they won't be available from us any longer. If you think you'll be using these in the future, then it may be a good idea to stock up. |