Workbench integration design, more solid. Sharpening can be fixed on any flat surface. Powerful vacuum chuck, strong suction, more stable. Universal ball design, more humane, can adjust the comfortable position. stone sharpening. It is not necessary to use oil or water. Perfect industrial design, beautiful appearance. knife. Color ruler to show the precise angle of the knife.Item Information:Dimensions: 440 x 125 x 65 mm. Weight: 930 g.Materials: stainless steel and plastic.Contents:1 professional knife sharpener.1 cleaning cloth.4 knife sharpening stones (180 #, 400 #, 800 #, 1500 #).1 marker.1 storage bag .1 instruction manual (English language not guaranteed).Note: Simple assembly required.Tip: When you use the product for the first time, you can put the grinding wheel in water for a while until it there are no blisters. When using, you can drop a few drops of water on the grinding wheel to prevent the grinding wheel from drying out when using. After use, please clean and dry the grinding wheel and place it in a standard temperature and dry environment to avoid high temperature and humidity. Note: The data are all manual measurement, please allow 1-3cm error, due to the light and display difference, there will be some color difference, depending on the physical object received.