This is an environment-friendly Kitchen Knife Sharpener, chef knife sharpener. So if you\'re aware of protecting the environment, consider using it.\r\n\r\nThe best chefs choice knife sharpener is made of very durable tungsten carbide technology, which can extend the service life of the tool.\r\n\r\nusage method:\r\n\r\n1. Press and hold the suction cup sharpener, and press down the pull rod to make the sucker adsorb on the smooth surface;\r\n\r\n2. Place the blade vertically in the V-groove of the grinder, and drag the tool forward and backward for 3-4 times to finish the sharpening.\r\n\r\nWeight: 53g\r\n\r\nSize: 2.6 * 2.4 inches\r\n\r\nMaterial: ABS + blade