Mining and Construction Machines and Equipment
TANGSHAN JINSHI ( JS ) is one of the largest Chinese drilling manufacturers , mainly product is NQ HQ PQ diamond bit, drill rod and drill tools. Our diamond bit is the best quality and lowest price in China. Size available: AQ,BQ,NQ,HQ,PQ,NQ3,HQ3,PQ3, HQ ...
HQ core bit,
NQ core bit,