Review on Cobalt Jobber Length Drilling Metal: Unleash Precision and Efficiency by Jeremy Meza

If it's "Cobalt" it must be the cheapest kind available! I have an HSS bit that cuts/drills circles around these things! I make a lot of "exotic" materials. titanium, niobium, damascus steel, etc. and I use a lot of drill bits! First, it is NOT a "135 degree division point". The drop is somewhere between 118 and 135 degrees and 1/2 the ones I got didn't have a "split point". I need to re-sharpen/re-sharpen ALL of these bits before using them. And when I used them, the best they could do was one hole per bit in .130" thick titanium with coolant applied. In short, it sucks! Don't waste money! I threw them away after first use. just not worth the trouble.