Review on Industrial Black Drill Degree Split by Nate Jenkins

Should have been on the negative review list. Wanted to drill out a manifold screw with it. Using a Dewalt bit, I drilled a pilot hole with little effort. Stuck in one of them hoping a left turn would loosen a bolt. Even with a pilot hole, they won't cut through. The first broke with enough shaft to work. Do the same with the second smaller drill. I had to quit then. I tried another, larger one, and it broke too. Nobody removed the screw material.