- Creative kitchen necessary, functional and artistic, got a patent for it’s unique design. The patent number is 201420442507.8. 2. Strength booster to save your energy and protect your hand from hurting and bleeding when you cut hard food, such as the pork ribs, pig trotter or other bone. 3. ABS round cap and stainless steel plates, functional and durable. 4. This item weighs 39g, the diameter of the round cap is 5.5cm, reasonable fist size and lightweight, suits for most of people. 5. The size of the stainless steel plate is 37 * 25 * 1mm, solid enough to be your hand guard when you cut the foods.