This is one of those happy little purchases. The Rada blade sharpener can be purchased for under $10 at Amazon. I think I found it for a dollar or two on a lightning deal around Christmas last year.
When we opened it, my wife and I were both skeptical. It’s a small little thing, and we doubted whether it would really do anything to sharpen a blade.
However, it does a great job as a manual knife sharpener. You simply hold it in place and slide the blade through. My wife was very impressed. She had previously used a fancy sharpener rod, which takes quite a bit more effort (and costs quite a bit more money). You can literally sharpen a blade with the Rada in a few seconds.
While this seemed like a throwaway purchase, this little guy has found a permanent home in our kitchen.