Sideshow Bob
Honorary Master
DIY experts here, please advise if you can. I want to cut out a rectangular notch - 2 notches (about 3.6cm x 2.5cm and 2cm in depth each) in a wooden sliding door with glass panes. I tried searching for "square drill bit" and apparently it is possible but I didn't find this particular drill bit at the shops (builders warehouse/express) - all the shop assistants looked at me with you-must-be-crazy-eyes when I mentioned "square drill bit". 
Alternatively, I was thinking of drilling round notch (as per size) and then chiseling the rest of it out. And no, I can't remove the door as it is a heavy sliding door. Anyone?
Alternatively, I was thinking of drilling round notch (as per size) and then chiseling the rest of it out. And no, I can't remove the door as it is a heavy sliding door. Anyone?