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Greenlee Knockout Punch Instructions-2

Some hole saws with broken and worn down teeth

A section of an old operating manual for Greenlee hand knockout punches

Front and back page of old operating instructions and parts list for Greenlee knockout punches and cutter
Piece of an old (Maybe 1960's) Greenlee Hand Knockout Punch operating instructions. Shown are dimensions of the knockout punch parts, and their Greenlee part numbers