Return a dull edge to fresh-from-the-factory condition with this Work Sharp Precision Adjust Knife Sharpener. Tri-Brasive 3-sided sharpening surface gives you coarse to fine grit in one tool. Sharpening angle is perfectly adjustable from 15Adeg to 30Adeg in 1Adeg increments, resulting in flawless, symmetrical sharpening every time.