1. Thermally wound shank for high abrasion resistance and longer lifespan 2. Internal tube (for flushing) of corrosion-proof and indestructible steel 3. Internal tube (for flushing) painted with special oil for corrosion and abrasion protection 4. Steel have two grades:Normal material 95CrMo and Super material 40SiMnCrNiMo 5. High precision, special bronze-brazing treatment.
Carbide Design of Tapered Buttons: Parabolic(Semi-Ballistic)
Water Holes: 2 on front, 1 on side.
Premium designs and steel and premium tungsten carbide insert grade T6 supplied by Boart Long year,tungsten carbide code No. YK05 supplied by Zhuzhou 601 factory,Offers industry-leading strength and penetration rates for more productivity.Excellent straightness and hole clean quality,Get max.drilling performance.