Perfect sharpener for my backpack. Diamond is a quick way to restore a really dull edge, but I mainly use a ceramic stick to touch up the edge. Sharpening guides make finding the right angle very easy. Great product for the price and it keeps my knives much sharper than what I previously had in my backpack which is now trash and has been thrown in the trash. I've found that a light touch works much better for me to get the desired benefit. Will buy another one for my tackle box.