Material: 360 Degrees without Dead Ends .Round head design perfectly protect your skin from scratching You can enjoy a safe and smooth shaving without scratching. Fit Model:Shave Replacement Head compatible with Remington Balder XR1600/RX7/ BOSS XR7120 and XR7100 shavers ,Not Compatible with Remington Balder Pro Hair Shaver (XR7000/XR1500/XR1501) Easy to Install: You can replace the shaving heads in a few minutes.place a tiny drop of baby oil on each heads and allow shaver to run for 10 seconds after installation ,to ensure your shaver run properly and smoothly. Suitable for:360 degrees Shaver Replacement Blades,suitable for Women/Men Wet Dry Hair Remover Replacement Heads. Warm Tip:To keep Your Shavers Super Performance.We recommend that you replace shaving heads every 3-6 months.Should you have any questions, please reach out to our customer service promptly. Thank you for your support. Shave Replacement Head Compatible With Remington Balder Replacement for XR1600/RX7/ BOSS XR7120 and XR7100 shavers