PDC drag drill bit、Drag Bit、PDC drag bit models and features： Suitable for soft - medium hard formation drilling, the kinds of bit with high efficient, high impact resistance, high abrasion resistance, can be used for deep drilling in complex formations; high quality PDC inserts, advanced welding technology, multiple precise heat treatment. Widely used in geological exploration, coal mining, mining, water, utilities and other industries rock drilling. Alloy drag bit fea:  Highest penetration rate,maximum wear resistance,longest lifespan in rough working conditions.High quality tungsten carbide inserts,advanced welding technology,multiple precise heat-treatment.Models:  60mm-610mm We can produce bit and thread type according to requirements .