Dry drilling of concrete walls for utility lines, ventilation, or other services is an extremely difficult and labor-intensive process. Manufacturers and specialists are constantly searching for ways to increase work speed. The spiral drill body effectively removes dust and debris from the drilling zone. The drill bit is designed for micro-impact drilling rigs. It has a length of 300 mm and a 1 1/4 UNC shank, making it an excellent solution for renovated spaces where the use of water is prohibited