8 1/2 Inches Single Cone Rock Roller Bits TCI Tricone Cutter, Drill Hard Rock

13 3/4" TCI Tricone Bit IADC 625, Hard Rock Bit for Well, Oil Field

Trenchless HDD Hole Opener Rock Reamer with TCI Tooth

500mm Hole opener for oil well drilling

Hole opener/Rock reamer for water well drilling with high quality

Trenchless HDD Hole Opener with TCI Tricone Bit