Review on Titanium Nitride Coated Comoware Drill by Chris Hamim

I bought these specifically to drill out a broken stabilizer bushing bolt. I have already drilled a pilot hole down the length of the remaining fractured section. Using reverse twist drills, I planned to gradually enlarge the hole, hoping it might break out and come out. Reverse beat blunted for the first 20 seconds. Then when I tried to slowly drill further, it broke in the hole. I would not recommend using it under any circumstances.