PDC Drill Bits drill edge is made of over-hardening PDCwith great wearability,faster drilling action,long life of drill bit,less comprehensive cost than alloyed anchor rod drill bits.
It can be widely used for the anchor net support drilling of mining,communication,water and electricity department,etc.main specifications:ф25- 28 30 32 42 we also can produce the products according to your drawing，or other  requested are welcome