... and high-intensity steel as material according to the different working conditions.The Advantages Of Rock Cutting Tools:1. Higher Quality2. With Strict ... Control3. More Reasonable price4. Better After-Sales Service The rock cutting tools are made from grade hard alloy and special steel, generally ... clients' need taper:4.8,6,7,11,12The diameter for taper:15,19,22,24,25(mm) Drill TypeBit diamater ...