Check the listing for details. Laser Knife Edge Reader- Knowing Your Angles With Leonards Way Knife Goniometer. Condition: New. Listed at 23.94 USD. Stop guessing at the angle you are sharpening your knives at with LEONARDS WAY an affordable laser goniometer easy enough for the average sharpener to use. The sharp edge you put on your blade is the key determining factor to your knife’s performance. You must know the angle you are sharpening your knives at to get them to perform their best. You can now use laser accuracy to get a quick and precise angle measurement, no more guessing. With the Laser Knife Edge Reader you will be able to sharpen your knives better because you will know the angle you are creating.