Description Smithâs 50933 Corded Knife & Scissor Sharpener has fixed 20-degree guides that allow you to sharpen all your knives and tools with one unit. The floating backing plates allow the belt to stay straight and not burn the blade tip. Have confidence in sharpening your tools correctly with blade guides that hold your knife or tool blade at the correct sharpening angle. Sharpener includes 3 abrasive belts (fine, medium, and coarse).