Scalers are used supragingivally to remove soft and hard deposits such as tartar above the gumline. Due to their pointed shape, they are not suitable for subgingival work. Scalers taper to a point. The working end of the instruments consists of a facial surface, working surfaces (also called lateral surfaces) and cutting edges.
Different angulations of the working ends define the working area. That is what universal instruments are for: for example, the Scaler M23, which can be used to reach all surfaces of the posterior and anterior teeth. In addition, it is particularly fine and delicate for use in interdental spaces.