Bread Bow Knife and Cutting Board Crumb Tray. The bow knife has a 9 inch stainless steel blade that never needs sharpening. It makes perfect toaster slices and is also great for use on fruits and vegetables. The cutting board crumb tray measures 16-3/4 inches by 7-1/4 inches by 3/4 inch. It is nicely finished natural wood as is the bow knife handle.