Need to sharpen knives? Use this 20° angle sharpening tool to help you maintain a consistant angle. 

How to use:

1. Print
2. Put the cylinders in the slots of the bottom of block
3. Place the block on your whetstone 
4. Place your knife flat on the block (Make sure the blade of the knife is on the whetstone)
5. Roll the block and knife at the same time along the whetston forward and backwards.