Philips Norelco QP220/80 2-PC OneBlade Detachable Hair Clipper Trimmer Shaver Razor Replacement BladeProduct description 2 blades will last you up to 8 months; For the best shaving experience, we recommend replacing the blade every 4 months Only OneBlade replacement blades have rounded tips that protect your skin and provide a shave that's not too close, allowing you to perfect your look, just the way you like it The OneBlade trims, edges and shaves any length of hair Our blades can be used wet with foam or dry, even in the shower OneBlade