Product Description: MAXIMUM STRENGTH & DURABILITY Proper selection of tungsten carbide and high quality steel combined?with a specialized heat treatment process and controlled?welding operation creates the optimum conditions required to attain?the impressive strength and durability of an SS White?bur. A study conducted at the University of Maryland confirms that SS White 557 burs are 84.67% stronger than Midwest Standard 557 Burs. POWERFUL CUTTING PERFORMANCE Carefully designed blade structure, rake angle, flute depth and spiral angulation combined with our specially formulated?tungsten carbide results in the powerful cutting?performance of our burs. SS White?burs are engineered?to deliver the most efficient cutting rate &?performance for the most popular procedures. Specs Shank: FG Shape: Safe End Bur Pack Size: Roll 25 Length Overall: 23.0 Working Length: 8 Head Diameter: 1.4 Tip Diameter: 0.3 Number of Blades: 10 Permanent Crowns: Yes Laminate Veneer: Yes Temporization: Yes Anterior Composite: Yes Orthodontics: Yes Pedodontics: Yes Periodontics: Yes Dental Laboratory, CB: Yes Dental Lab Acrylic: Yes Single-Patient-Use : Yes