JRL SF Pro Shaver Replacement Head is the original replacement head for the JRL SF Pro Shaver / Onyx SF Pro Shaver, a specially designed interchangeable blade and foil unit that helps ensure smooth and precise shaving even after the original head has worn out. Key Features: Patented Magnetic Levitation Technology allows the blades to “float” without mechanical friction, providing a smooth, even, and low-irritation shave. Ultra-thin, skin-friendly foil delivers a very close cut while being gentle on the skin. Durable, long-lasting construction is designed for daily professional use in barbershops and salons. Easy to replace — the replacement head is simple to install and remove when the original blade is worn or shaving performance needs to be restored.