Specification: Material: Carbide alloy Shank diameter: 1/4" (6.35mm) Groove: Double Rotary Quantity: 8pcs/set Feature: The carbide alloy rotary file use is extremely widespread, applies in the mold processing manufacture. Machine parts bevel edge, inverted round and trench processing. Good processing quality, finish high, long service life. Can process a variety of high-precision mold cavity. Can be processed cast iron, cast steel, carbon steel, alloy steel, stainless steel, copper, aluminum and other metals, and marble, jade, bone and other non-metallic. Easy to grasp, easy to use, safe and reliable. Reduces the arduous manual labor greatly, reduce the cost of production. Widely used in machinery, automobile, shipbuilding, chemical, craft sculpture ect.. The carbide alloy rotary file main supporting the use of electric tool or the use of electric tool or the pneumatic tool (may also install on machine tool). Package includes: 1pc 1/2" x 1" cylindrical shape 1pc 3/8" x 3/4" cylindrical shape 1pc 3/8" x 3/4" cylindrical radius end 1pc 1/4" x 5/8" cylindrical radius end 1pc 1/4" ball shape 1pc 3/8" ball shape 1pc 3/8" x 3/4" tree shaped radius end 1pc 1/2" x 1" tree shaped radius end Warming Tips: Computer monitors display colors quite differently,the color of the article may vary slightly from the pictures above. Please allow 1-2cm differences because of the manual measurement. The images are for reference only. please take the item you get as the standard.