LM Instruments Sickle scalers, used for the removal of supragingival calculus feature a triangular cross-section with the face perpendicular to the lower shank. These scalers feature two cutting edges as well as a pointed tip. The Mini Sickle shown here features the same angle as the Crane-Kaplan scaler but has a more delicate blade. It is designed for use on all tooth surfaces, particularly proximal surfaces.