Review on Bosch CO2150 4 7 Cobalt Drill by Jesse Azuse

These drill bits are high quality. I bought 2 of these as I was drilling about 60-70 holes in the top of the bus roof to install rivets and then rails for decks and solar panels. I thought I needed both nozzles, but one cuts like butter to the last hole. I've used Tap Magic quite a bit, wiping the bit every few holes. I highly recommend.