The HQ9 replacement head is designed with strict reference to the original specifications of the corresponding Philips shaver, from the head bayonet to the overall structure, all of which are precisely matched. The replacement process is simple and convenient, simply switch off the shaver and press the release button on the head to remove the old head; align the new HQ9 head with the slot and press gently to hear the crisp click sound of a solid installation. The whole process is tool-free, so even first-time users can get started quickly and complete the changeover, restoring the shaver to its optimal condition in an instant. Forged steel blades for long-lasting sharpness: The head blades are made of high-quality steel, which has been forged and polished through a number of complex processes. Steel gives the blade outstanding hardness and toughness, not only extremely sharp, can instantly cut off the beard, but also has excellent wear resistance, long time use is not easy to become blunt. Whether it's a short, soft beard or a long, thick, hard beard, it can be easily cut off under the high-speed rotation of the blade, making every shave as smooth and efficient as using a new razor for the first time, greatly reducing the number of shaves and saving valuable time. Precision Mesh Design, Efficiently Capturing Whiskers: The matching mesh is made of high-quality stainless steel, and the mesh is precisely calculated and designed to be evenly distributed and uniquely shaped. The special mesh structure can effectively expand the shaving range and accurately capture whiskers of different growth directions and lengths. The surface of the mesh is finely polished and as smooth as a mirror, while efficiently intercepting the beard, it avoids any scratching or injury to the skin, providing gentle care for the skin and achieving a perfect balance between efficient shaving and comfortable experience. Flexibility to fit the face and shave without dead ends: With an intelligent fit system that mimics the original head, the HQ9 head has excellent flexibility and automatically adjusts its angle to the contours of the face. Whether it's the gentle curves of the cheeks, the undulations of the chin, or the intricate contours of the neck, the head fits snugly, always maintaining the optimal shaving angle for an all-around, no-dead-angle shave. It ensures that every part of the beard is thoroughly removed, giving you a clean shave and a fresh, clean look that will make you feel confident every day.