B&Q Blades - Half Year Supply - 5 Packs of 55 Packs of double edge stainless steel blades (25 Blades) These blades are better for the environment as they contain no plastic. A single blade can be used for up to 8 shaves which means these can last up to half a year. When you are done with a blade, we suggest putting it in a glass jar instead of throwing it away. This helps to keep the people dealing with your rubbish safe from any cuts as these blades are very sharp.