材料
Alloy steel and tungsten carbide
type
threaded button drill bit
Carbide Button shape
Spherical Button,Ballistic Button,Ogive Button
Button Material
tungsten carbide
Thread type
R22,R25,R28,R32,R38,T38,T45,T51,ST58,ST68,GT60
Application
borehole drilling in the quarries/coal mines
Advantage
high quality ,low price and best service