Review on 📦 Stainless STROTON Independent Packaging Specification by Fred Griffin

I had some stainless steel that conventional drill bits were useless with. After some research and reading reviews I got them. They work where other drills don't. I drilled 8 holes with one of these drills while trying so many other drills. As soon as they arrived, they started to work. Be careful with anything Cobalt Driller says. It's about as good as you can get. Be sure to use oil with them and also use water to cool them down while drilling. One of the best drills I've ever had.