Durable and detachable * Cryogenic cutter technology * Stays over 50-percent cooler and 50-percent sharper longer than conventional blades * Universal fit on all detachable-style blade clippers: Oster, Andis, Wahl & Laube * Size 7f, 3.0 mm * Universal fit on all detachable style blade clippers: Oster, Andis, Wahl, Laube