Design: Posterior scalers are dental instruments designed for use on the back teeth (posterior teeth). They often have a specific design to allow for better access to these harder-to-reach areas. Working End: The working end of a scaler typically features a pointed or curved tip, allowing for effective removal of calculus and plaque from the surfaces of the teeth. Material: Dental instruments are commonly made of high-quality stainless steel or other materials that are resistant to corrosion and can withstand the sterilization processes necessary in dental practices.