Review on 🔩 JIUWU Tungsten-Cemented Stainless Aluminum Alloy by Jack Ford

I have already drilled bolts from very old and hard steel with these drills! I used hammer mode on my Rigid cordless drill with coolant and knocked the drill out after a few hours. Doing the same job I tried cobalt drills which were much less efficient, took much more time and cost a lot of money! I also used this set of carbide drill bits to drill the head of the rotor screw, which was deburred. I pierced it through in less than a minute and the rotor came loose. I was then able to loosen the remaining screw with a screwdriver. Please do yourself a favor and buy this electric drill!