Typhoon carbide bur in bud shape. 5/16" head dia. x 34" head length, 1/8" shank. Typhoons have unique structurally aligned points that leave a smoother finish than other types of tungsten carbide burs. Ideal for general shaping and sanding 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 35,000 rpm. Made in USA Comes in fine and coarse grit Fine grit is blue Coarse grit is red