Who suffered, making holes in concrete slab, knows that the best assistant in this case — a power drill. Well, if it does not exist? You will rescue two hammer and carbide drill bit d 4 and 7 mm. First, work a smaller drill bit and lightly hitting it with a hammer and turning a bit after each stroke. Breaking to a depth of 5-10 mm, model drill more and clean the resulting hole. The cycle is then repeated in 20 minutes manages to punch a hole to a depth of 40 mm.
Recommend to read
TROUBLE-FREE VALVE
The valve switches the water installed in the bathrooms and on the kitchen sink, often fail and the cause is the deformation of the rubber cuff, which slides with Kalpana when trying to...
BRACKETS FOR STEREO SPEAKERS
Stereoscopy household radio equipment increasingly enters the house. Rarely one will see speakers in corners of the room... But where: on the floor, on bookshelves, on the furniture!...
