Why can't electric drill be used in the wall?
Drilling concrete to use impact drilling, carbide bit to sharpen the tip, if hit the steel reinforced steel bit, at this time can not use the impact.
First of all to use or hammer impact drill, drill can not be usedSecondly, it is possible to touch the steel bar, and observe the drill hole is not out of ash, if not ash when drilling, it must be touched steel, staggered two or three cm try.
Bit wear off, not touch the steel bar, but the general electric drill can not hit the concrete, you need to impact drilling, and if there is no impact drill, but also the brick wall can buy more than a few drill bit, drilling plus a little diamond can also be drilled.
