How to choose the double function drill of live electric drill and impact drill?
You can see from the above, if you just have a porcelain brick wall and playing a few holes, you can buy a shock anvil.If the holes are concrete, with the impact of anvil very difficult, it is best to buy a hammer.
Hammer: use it in drilling cement and brick and stone and other hard objects. At work, the drill is subjected to two movements, one is the axial impact vibration, and the other is the slow rotation of the bit. It's easy to drill through thick concrete.
Drill (drill): drill and drill drilling wood, iron brick, but can not drill concrete, some impact drill that can be drilled concrete, actually is not feasible, but the tiles and bricks that drill out a very thin layer of cement is no problem. Take indoor for example, the ceiling is reinforced concrete, with impact drill is very laborious.
