KB14159 Typhoon Carbide Bur-15? Taper (Fine) "Typhoon" carbide bur in 15? taper shape. Fine grit, 9/16" head dia. x 1" head length, 1/4" shank. Typhoons have unique structurally aligned points that leave a smoother finish than other types of tungsten carbide burs. Ideal for rapid and aggressive shaping and roughing out work on hard and soft wood, acrylic, die stone, plaster, hard rubber and fiberglass. Typhoon burs last longer and do not load as quickly. Max. speed 25,000 rpm. Made in USA. Clean with HB58 Brass Brush. Do not use a file card or steel brush to clean Typhoon burs and sleeves.