Review on 🔩 Bosch HB412 4 1 Bi Metal Hole: The Ultimate Tool for Precision Drilling by Robert Espinoza

Quick assembly of 8 ceiling lights. Since my cuts were only in the drywall, I followed the YouTube repairman's advice and reversed the drill once the pilot hole started to finish the cuts. In this case the saw is less aggressive so there is very little "chatter" or sticking/twisting and you end up with a cleaner hole and almost no bit wear (see photo). Even the thin plastic membrane between drywall and blow-in insulation was hardly damaged!