It is a great tube notcher , but agree with you that missing flat to hold on , if you need the change the hole saw. Or will be nice to use some pin to prevent shaft from accidentally sliding out, if the notcher is not permanently installed. The pin will actually act like stop the shaft from turning and help to change the saw too. Same system like is used on Harbor Freight notcher .
It is a great tube notcher , but agree with you that missing flat to hold on , if you need the change the hole saw. Or will be nice to use some pin to prevent shaft from accidentally sliding out, if the notcher is not permanently installed. The pin will actually act like stop the shaft from turning and help to change the saw too. Same system like is used on Harbor Freight notcher .
Thanks for the comment!