FastEdge Manual Knife Sharpener has an 18-degree 2-stage removable cartridge. There is a coarse carbide side for sharpening and a fine ceramic side for honing and fine-tuning your knife edge. With just 4-6 pulls through both sides, your knife will be as sharp as new. No more guessing angles. Easy to clean by removing the cartridge. Use dish soap, rinse under warm water, dry, and store. Fits easily into your kitchen drawer.