I have been looking for a new knife sharpener for a while now. After a lot of research I found the Ninja™ Foodi™ NeverDull™ System Knife Sharpener. It looked to good to be true. But this thing works awesome. When you push the knife into the sharpener it locks in so it cant slide back out. After a few pulls on tree he handle the knife is like new. There is even a unlock button you need to push and hold to get the knife out.
I absolutely love this thing. It works great and it also safe.