15-8-14 Hatchets used for cavity preparation: retentive areas, internal line angles and removing hard caries. Premium Quality French Stainless steel: Dedicated to quality and style, All Dental tools are manufactured using the highest quality surgical rust-free stainless steel. An essential set of tools next to your teeth whitening products and stain erasers. Can be used easily for Human Teeth or you can use it for your dog or cat. Sterilization is recommended before use.