The Work Sharp Precision Adjust Knife Sharpener is an angle adjustable, three abrasive grit, knife sharpening system that delivers precision and repeatability. Sharpening Angle can be easily adjusted from 15 to 30 degrees in 1 degree increments to sharpen every knife you own. Tri-Brasive includes coarse 320 and fine 600 grit diamond plates to quickly restore a sharp edge, and a fine grit ceramic stone to hone an incredibly keen edge on your knives. Innovative clamp design quickly and safely secures the knife. Sharpening base provides a stable platform for benchtop sharpening.