Inner opener bits

Crown opener bits

External pipe

Internal

pipe

Internal/External

pipe adapter

Small/Big adapter

165 Overburden  Drilling

(mm)

Diameter

ø 175

Ø135

ø165

Ø89

Ø89 / ø165

Ø89/ø165

(mm)

Length

-

-

2000

2000

250 / 300

350

Thread

R152-2/3

R78

R152-2/3

R78

R78 / R152-2/3