Cut a 7" piece of 5/16" or 3/8" dowel, whichever size you drilled the hole.
And glue it in place using medium CA. Cut the stick to a projection of 5 1/4"
Tap the block using a 1/4" 20 metal tap and
install an eybolt. I used to put the eyebolt on the opposite side but it is easier to position a gouge in the block with the bolt on this side. For an Oland tool it does not matter because the tool does not have a groove.
With blocks made and arm ready, it is time to sharpen a tool or two.