Medium-hard and abrasive rocks such as: sandstones interspersed
with streaks of quartz, hard limestone or chert, conglomerates
with limestone, ferruginous or silica binder, crystalline
dolomites, hematite ores, siderites, limonites, hard shales.
Not long teeth with
greater top angle. The teeth of outer rows have properly
increased hardfaced gage surface. Additionally, the bit
is gage protected by means of tungsten carbide inserts
which ensures its high durability.
