What is the different application for different sharp tungsten carbide button

What is the different application for different sharp  tungsten carbide button

There are five different sharp tungsten carbide button

Domed / Spherical Button

Domed /Spherical Buttons are usually used as gauge buttons of DTH Bits, suitable for very abasive and very hard formations.

Parabolic/Semi-Ballistic Buttons

Parabolic Buttons are usually used as gauge buttons and front buttons of DTH Bits, suitable for medium abrasive and hard formations.

Ballistic Button

Ballistic Buttonsare usually used as front buttons of DTH Bits, suitable for medium abrasive and medium hard formations. They can also be used as gauge buttons if the rock is soft.

Sharp Button

Sharp Buttons are usually used as front buttons of DTH bits for soft formations where fast penetration rates are possible and button breakage is minimal

Flat Button

Flat buttons are usually used as protection buttons to reduce wear on rubbing surfaces of DTH Bits