Abstract: Improved cutter elements for drill bits of the type having two to four conical-shaped cutters mounted in a supporting body for rotation about their respective axes with their apices inclined downwardly-inwardly toward the axis of rotation of the body; the cutter elements are spaced apart from one another both axially and circumferentially of the substantially conical exterior of each conical-shaped cutter and, usually, disposed in spaced circumferential rows, each cutter element including a pair of interacting chisel or wedge-shaped teeth intersecting each other--preferably at their medial portions in perpendicular relationship--coextensive from crest to root and having their respective crests extending approximately radially of the axis of rotation of said cutter and generally circumferentially of said cutter axis; the circumferentially--oriented teeth have coextensive cutting edges at their ends and are adapted to cut through ridges created in the formation by the radially-oriented teeth and laterally displ