These blade refills for women also feature a pivoting head that adjusts to your curves, including ankles and knees. No awkwardly angling your razor. Each blade refill lasts up to one month (based on twice/week shave); just use and replace when you're ready for a new one. Did you know that any Venus blade refill fits any Venus razor handle (except Simply Venus and Venus Pubic Hair Razor)? Shave your way without buying a whole new Venus handle.