The Philips Norelco OneBlade replacement blade trims, edges, and shaves any length of hair. The unique OneBlade shaving technology integrates a fast moving cutter (200x per second) with a dual protection system to give you an efficient comfortabe shave on longer hairs. OneBlade does not shave too close, so your skin stays comfortable. Two replaceablement blade last up to 8 months* (*For best shaving experience. Based on 2 full shaves per week. Actual results may vary.)