Which of the following is true regarding the design of a scaler?

The design of a scaler typically features a pointed tip to facilitate precise removal of calculus and debris from teeth. The pointed tip allows for effective scaling in narrow areas, making it suitable for accessing tight interproximal spaces and subgingival environments. This design is essential for health professionals to strategically remove deposits, particularly in periodontal care.

While some scalers can have additional cutting edges for various applications, the characteristic of having a pointed tip is a fundamental design feature that contributes to the efficacy of scalers in periodontal treatment. Other options do not accurately represent the primary design features or intended uses of scalers. For example, while scalers can be used for supragingival and subgingival purposes, they are primarily designed with that pointed tip in mind; thus, the option chosen correctly emphasizes that aspect of a scaler's design.