In construction you often have to deal with the internal measurements. For example, to determine the distance between the form panels, the value of the window or doorway. A good assistant in such cases would be sliding ruler, made of tube and metal rod with applied risk. V. ANTIPIN
Recommend to read
WITH A COMPASS THROUGH THE WALL
If the wall must be drilled through hole, and the length of the drill is not enough, then this operation can be performed in two stages: the one on the other side of the wall. Drill to...
Insurance for drill
Drill chuck, in particular manual, is not always able to keep the drill from turning when machining hard metals or release of the cutting edges of metal. It solves the problem of the...
