Review on 🔩 Cobalt Drill Bit by Bosch: CO2151 by Julian Perkins

Simply poked through this strong aluminum with no tension, however the metal stuck to the bit until the coating wore off, after which it continued to work smoothly. I don't think the coating helped, but the bit is still as sharp as a blade after 20 1.5" dives without cutting lube. Normally I would lube, but aluminum conducts heat so well it's not really necessary. Definitely Bosch quality.