Down the Hole Button Bits
Down the Hole Button Bits diameter: 76mm to 311mm;
Down the Hole Button Bits shank style: DHD3.5, DHD340, DHD350, DHD360, DHD380, COP34,COP44,COP54,COP64,COP84, SD4, SD5, SD6, SD8, QL40,QL50,QL60,QL80, Mission 40, Mission 50, Mission60, Mission 80, BR2, BR3, Mach33, etc;
Down the Hole Button Bits face design: Flat face, convex face, concave face, DGR;
Down the Hole Button Bits carbides style: hemi-spherical(round), Parabolic(semi-ballistic), Ballistic(conical);