How to buy a home or hammer drill
Take indoor for example, the ceiling is reinforced concrete, with impact drill is very laborious. 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. You can see from the above, only if there is a porcelain plate and brick wall play a few holes, you can buy a percussion drill.
Electric hammer drill and impact electric drill difference in use: 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.
