DUAL TRACK BLADES FOR A CLOSER SHAVE: The replacement head is engineered with Dual Track Blades, ensuring better coverage during shaving and allowing more of your hair to be effectively cut! MAINTAIN PEAK SHAVER PERFORMANCE: Compatible with the Remington R4 Style Series (R4010 and R4011), this replacement head ensures your shaver runs smoothly and meets your grooming needs effortlessly. 12-MONTH LONG LIFESPAN: Achieve the best shave possible by easily replacing heads and cutters every 12 months, ensuring a smooth and comfortable finish. AVOID SKIN IRRITATION: To prevent irritated skin, make sure to replace your shaver head regularly. Pay attention to any signs of irritation, particularly when applying lotion, as this may signal that your shaver heads are worn out. RESTORATIVE SHAVING RESULTS: If you’re experiencing pulling or a lack of closeness while shaving, it’s time to replace your shaving head for that ultimate comfort.