👍Compatible with Remington BOSS XR7120 and XR7100/XR1600/RX7 shavers,* Not compatible with Shaver (XR7000/XR1500/XR1501) shavers,The sizes of the two blades are different, so they cannot be used interchangeably. 👍You can replace the shaving heads in minutes. Place a small drop of oil on each head and perform the shaver for 10 seconds after installation to ensure the shaver works properly and smoothly. 👍The round head design perfectly protects the skin from scratches. You can enjoy a safe and smooth shave without scratching. 👍Keep your razor performing super well. It is recommended to replace the shaving heads every twelve months 👍Compatible with Remington BOSS XR7120 and XR7100/XR1600/RX7 shavers,* Not compatible with Shaver (XR7000/XR1500/XR1501) shavers,The sizes of the two blades are different, so they cannot be used interchangeably.