42 drilling dirt rig bits

These precision ground, bright finish bits are constructed out of hardened and tempered M2 high-speed steel and fall between standard fractional drill sizes. These jobber length bits feature a 135-degree split point for fast penetration and accurate self centering. [pdf]

Drill bits oil rig

Rotary drilling bits are usually classified as drag bits or rolling cutter bits according to their design. All drag bits consist of fixed cutter blades that are integral to the body of the bit and rotate as a unit. [pdf]