Lansky Standard Sharpening System is the most popular kit. It comes in a plastic carrying case that contains: coarse, medium, and fine sharpening hones; 3 guide rods; 1oz bottle of Lansky Honing Oil; knife clamp/angle guide; and spare screws for clamp. This Lansky system gives you a fine, smooth, edge on all your straight-edged knives. The carrying case has slots for 5 hones so you can add additional hones if you want or need them.