Review on 🔧 Mgtgbao Carbide Concrete Masonry Plastic Cutting Tools and Industrial Drill Bits by Ian Iknokinok

It is best to use up all the drills. I need the second largest which is the only one. I drilled about 3/4" through the concrete and noticed that the ribs were rounded at the head. I needed to drill three more holes, so I started with smaller bits (one for each hole) and drilled the last hole I needed This worked better but still destroyed the heads of all drill bits I used, they are only good for drilling a hole in concrete.