Masonry drills made of high quality alloy steel 40Cr (metal construction part) and tungsten carbide tip YG8C
(drilling tips) with tips' hardness 88°HRc (+/-2°) and point angle 130°.
Special shape of soldered tungsten carbide tips ensures quick and central drilling.
Cylindrical shank with patented multi-channel KVS spiral with symetric shape on total length,
guarantees stable and dynamic characteristics when drilling (reduction of vibration), what significantly
enlarges drilling capacity as a result of quick chips removal from the hole and extends drills' working life.
Heat treatment and surface sandblasting reduces drills' wear and enlarges durability on inside stresses
which appear while using.
Suitable for industrial purposes when using drills with clamping in 3-jawed drill chucks for drilling
in masonry, concrete, granite and other natural stones.
According to DIN-8039.