Tupperware Tabletop Knife Sharpener Rare Protect your knife investment with this unique and useful kitchen tool. The clear domed cover doubles as a hand rest while the flat bottom flips up to become a hand guard that protects you from blades while sharpening. Two-step design features durable ceramic stones: step 1 features a coarse stone for sharpening dull blades, while step 2 has a finer stone for finishing or touching up blades. Non-slip feet provide the ultimate in sharpening control, and the compact design takes up less space in a drawer or cupboard. It's designed for use specifically on non-serrated stamped or forged knives.