Knife Sharpening Kit includes knife clamp, angle guides, guide rods, roll pouch and a Superfine, Fine and Medium Diamond sharpening stone. This is a system designed to take the guess work out of sharpening. Pick you desired angle for the knife you are sharpening and the fixed jig will keep your strokes consistent which is key to successful sharpening. Ideal for the Gerber E-Z Open knife and all your knives. The long slot designed on the clamp or Jig allows the diamond stone to travel with long bladed knives. If you don?t all ready know EZE Lap diamonds and the process used to attach them to the sharpener is superior to other manufactures. You do not use oil or any solvent with the stones when sharpening. Clean with borax or detergent soap between sharpening. Tested and compared by Rick Young many times.