Each Disc comes with T-25 Star Screwdriver. For faster, easier, more economical hoof trimming. Steel disc with long wearing hardened cutting edges will effortlessly trim and shape a hoof with control and ease. Ideal for large herds and professional trimmers, comes with 3 interchangeable inserts. Each insert has two sharpened edges that can be rotated and sharpened up to 5-6 times. Replacement inserts available.