Any chef will tell you, a sharp knife is the most important tool in the kitchen. I have tried many different types of sharpening methods, from stones to steels, electric to manual. Stones are hard to use because you need to maintain a very consistent angle while using it, and other gimmicky sharpening tools are just not good enough to give you a good edge. And very, very few can sharpen a serrated blade. I won't lie — I can't use a manual sharpening stone to save my life.
My dad got me the Work Sharp WSKTS Knife and Tool Sharpener and I swear I've never seen its equal. It is approximately the size of an electric drill and uses sanding belts of three different grits: 80 for repairing blades, 220 for sharpening, and 6000 for putting on that smooth polish. The sanding belts are very easy to change and last long enough for you to sharpening everything in the house, from your scissors and kitchen knives to axe and lawnmower blades. The head of the tool swivels so you can use it free-hand to sharpen very large items, like shovels.
One of the best features is the guards that attach to the tool that keep the sharpening angle perfectly consistent. The first guard offers a 50° angle for large hunting and butchery knives, and a 40° angle for thinner knives. The second guard allows you to sharpen serrated blades and heavier outdoor blades.
Best of all, this sharpening system only costs around $70 and packs of 6 replacement belts cost around $9. They also offer packs of 2 diamond belts for around $26 for sharpening those pesky ceramic blades. — Joel Roush