This Ultimate Knife has an adjustable guide to help you cut foods to the perfect thickness. Just turn the knob to adjust the guide's thickness then cut perfect, even slices of anything from bread to meat to vegetables! The width of the guide is very easy to set: just turn the knob. The guide is flat and stands out from the side of the knife to support the food slice as you cut it. The package includes the Ultimate Fork, as well, to help you hygienically hold food while you cut.