Review on 🔩 Bosch CO2143 High-Speed Cobalt Drill Bit by Mohmed Burt

Terrible drill bits! I needed to drill a few holes in 1/2" sheet steel, not stainless steel. The first bit started working fine, and then a little over half just stopped cutting. I took out the bit and found that the Cutting edge was broken. in several places. I put in the second drill bit that I received from the same purchase and it finished drilling the first hole. I started the second hole and then it stopped cutting too. I have removed the second drill bit and it had the same problem cutting the edge chipped and broken.These Chinese made Bosch cobalt bits appear to be extremely brittle and not fit for their intended purpose.And yes, cutting fluid was used.