I have used this blade for well over a year now to mow down my fields of overgrown grass. I usually sharpen it with a metal file, but sometimes with a bench grinder or a rotary tool, depending on how much metal needs to be taken off. As with any blade of this type, you MUST sharpen it, which is a considerable amount of work. But if you keep it sharp, you can mow down a whole field of tall grass with ease.I bought these blades for the larger size and very low price.