"Darrell Feltmate" wrote:

Andy
I have been making my Oland tools after the manner of Knud Oland but
whatever works for you, works for you. He made his tools as I
illustrated on the web site by drilling a round hole in the end of a
round, not square, tube and inserting a square tool bit in the round
hole.

Darrell, just to clarify, you mean 'rod' not 'tube'?