PDC anchor shank drill bits are mainly used for the coal seam, dam and roadway construction of bolt-mesh support. Their life are 10-30 times of tungsten carbide bits. Usually the anchor shank drill bits have 2 or 3 wings. LD adopt high quality cutters and advanced brazing technology, so the anchor shank drill bits have high impact resistance and stable performance, can be applied to rock formation of f below 14,like gravel, granite, limestone, etc. Features: 1.Increased wear resistance and toughness. 2.Boosts production rates by reducing change overs. 3.Fast penetrating two wing drill bit for wet drilling with centre flushing. 4.PDC drill bits feature cutters made of polycrystalline diamond layer sintered with tungsten carbide subtsrate. Key Features Increased wear resistance and toughness. Boosts production rates by reducing change overs. Fast penetrating two wing drill bit for wet drilling with centre flushing. PDC drill bits feature cutters made of polycrystalline diamond layer sintered with tungsten carbide subtsrate. The increased abrasion resistance and durability of PDC should provide a more economical bit with longer life and higher production rates through increased drill speeds and feed rates. The negative front rake, and eccentric tips, makes it suitable for hard rock. The PDC insert provides extremely good wear resistance for all types of conditions. These extra flush drill bits have a 5mm diameter centre hole plus two side water grooves for extra flushing. The drill bit body is specifically designed for clearance of rock cuttings. The body is made of high tensile material for strength and abrasion resistance. Our diameter is from 25mm to 42mm, any special design is available upon customers request. drawings/samples/requirements