Dual Rotary Blade Sharpener is a wonderful little tool that extends the life of your cutting blades.Don't throw away those old blades! Sharpen them, and use them again and again! The Rotary Blade Sharpener is good for over a hundred sharpenings. Restores a razor-like edge to the rotary blade. Once Dual Rotary Blade Sharpener is assembled properly, twist handle (clockwise & counter-clockwise) against the sharpening disk.
"I have tried many Rotary Blade Sharpeners, even the electric one. This is the best one out there. It will not take nicks in the blade away, however it will give you a sharper edge on your blade until you can buy new ones."