A tricone bit is a drill bit used for drilling through rock, for example when drilling for oil and gas.

Roller-Cone bits are composed of rotating disks called cones. Rock hardness is one of the determining factors taken into account when selecting an appropriate drill bit. The cutting structure of the bits varies according to the rock formation. Softer formations are drilled with a roller-cone bit with widely spaced, long protruding teeth. Whereas harder formations are drilled with closer-spaced and shorter-toothed bits. Roller-Cone bits are versatile and can cut through many formation types.