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
“MY” BIKE
Many cyclists, especially in provincial cities and towns, and put "on a trick" their "two-legged horses" and in the winter time. But winter is winter. Even four-wheel vehicles are...
INDIVIDUAL “SHADOW”
Going on a fine summer day at the beach, you take a small bedroll, which at the chosen place and unfold the envy of all the neighboring vacationers receive individual oblong tent at the...
