TWIN BLADES - Fixed head twin blades that glide across your skin for a clean, close, comfortable shave Compatible with razor handle that accepts Atra. Blades have lubricating strip for a more comfortable shave Stainless Steel Blades are treated to ensure smooth shaves Please note these blades are not for use on Fusion, Sensor and Mach razors， For best results, use with your favorite Shave gel, cream or foam Razor blade refill cartridge comes with twin blades for a clean, close shave. The razor blade refill also features a lubrastrip to ensure a comfortable, smooth shave. A great alternative to those high priced razor’s at a significant savings. Compare this price for 30 mens cartridges to the price you are paying at retail and then compare the shave. You won’t go to the store again to buy your razors. These may have a cheap razor price, but not a cheap shave quality.