The Magna Wonder Knife, also called the Victorinox Forschner Precise , is a knife designed with a cutting guide for individuals who are blind or have low vision. This all-purpose, stainless steel knife has a blade with a scalloped edge. The adjustable guide is also detachable and can cut slices from 1/16 to 1/2 inch thick. The knife never needs sharpening and it is dishwasher safe. OPTIONS: Right or left hand knife; replacement guide mechanism. DIMENSIONS: Blade is 8.25 inches.