Instrumentation: Place the tip third or half of the cutting edge of a Gracey curette against the tooth surface. The larger outer curve is always the cutting edge. Make sure that the lower shank is parallel with the tooth surface. For calculus removal apply moderate and for root planing light lateral pressure and activate the curette by using vertical, diagonal or horizontal pull strokes. Design: Working surface inclined 20 degrees to the lower shank, One curved cutting edge, Rounded cutting tip.