45mmR32 9mm semi ballistic buttons top hammer steel drill bit with fast speed

STEEL material :45CrNiMov.

Tungsten carbide:YK05.

Button shape:

Semi ballistic with 9mm.is the best for normal hardness rock,and bits with very fast speed.

for parabolic button shape with 10mm is suitable for very hard rock,and the bits drill speed is slower than ballistic shape.

spherical button shape is the most welcome design for exporting,this design button shape is for very very hard rock.