I have been processing my own game and fish for 40 years. I've wasted a lot of money on sharpeners that claim to be the best, and they've turned out to be junk, cheap, or mediocre at best.
The Knife & Tool Sharpener MK.2 from Work Sharp is by far the easiest to use and most-effective sharpener for all of my knife sharpening needs. It's simple to use, sharpens in a very short time, and my knives stay sharp.
Easy-to-follow instructions and diagrams will have you sharpening knives like a pro butcher! Changing the angle of the sharpener to fit your needs for various knives is super simple! Change the angle, swap the sharpening bands, and get you the edge you need very easily. It's very user friendly.
I cannot say enough good about this sharpener. Truly the best I've used!