safety lock out for 240 ac button

http://www.ebay.com.au/itm/SPST-NO-Circuit-Control-Momentary-Green-Mushroom-Push-Button-Switch-240V-3A-/391262017629?hash=item5b1908985d:g:9tMAAOSwN2VZQ-DQ

https://youtu.be/RYcXSSjkXBs

print both files - as u need a left side and right side.
9mm hole for pad lock
msg if you need this altered