Designed for drilling in extremely hard materials, including stainless steel. Cobalt drill bits have a great resistance to heat and friction providing a longer tool life. Century 135 degree quick-cut points are self-centering and penetrate faster with less pressure. Cobalt drill bits offer 14 times Life Rating when compared to standard 118 degree point drill bits.
I recently purchased a cobalt drill bit from the Industrial and Scientific category and have been thoroughly impressed .Thanks to my knowledge gained in practice with other brands and products, i know that not all cutting tools are created equal, but this one is top-notch. The bit has held up exceptionally well after several uses and still cuts through tough materials without any issues. The only downside is the price, but it is well worth the investment for a quality product that will last..
Pros
Durable cobalt construction for long-lasting use
Cons
Higher price point compared to standard drill bits
I use this on stainless steel, worked great I got about 48 in my drilling time. and it's just as sharp as it was when I first took it out of the box. Just use some lube and go slow
Pros
Century 135 degree quick release bits self-center and penetrate faster with less pressure