Letter/Number Punch Holder

[mklotz]

Well done. "Assembling" square holes as you've done here is often more practical than trying to excavate them.

Another dodge for creating square holes is to mill a slot of the square size in a piece of cylindrical stock then secure the cylinder in a hole drilled to accept it. I used that procedure to make a holder so my boring head could accept a square lathe tool...

http://www.homemadetools.net/forum/e...ing-head-27452