The Jamie Oliver stay sharp knife tool is an easy to use knife sharpener that"ll keep all of your knife blades razor sharp. It features a hard wearing ceramic wheel, a built-in safety guard and anti-slip rubber feet. Keeping your knives sharp and keeping you safe, the Jamie Oliver stay sharp knife tool. Designed by dkb household and Jamie Oliver - dkb household known for innovation and quality and Jamie Oliver - one of the world"s best-loved chefs.