About This Sharpening Honing Sticks for Detail and knife Sharpening & Polishing - Multi-shape Set (Triangle, Cylindrical, Semi-Cylindrical, Rectangular), each with 120# and 600# grits. 4 Shapes-Dimensions: Triangle: 150*10 mm ( 5.91*0.39 inches); Cylindrical: 150*10 mm (5.91*0.39 inches);Semi-Cylindrical: 150*12*6 mm (5.91*0.47*0.24 inches); Rectangular: 150*10*10 mm (5.91*0.39*0.39 inches); [The stone is made of high temperature sinter, dense and fine texture, high hardness and strength. When grinding workpieces, it can maintain a sharp edge and stable geometry for a long time. [Use] It can be used for polishing and sharpening metal surfaces such as workpieces, knives and paint, especially for parts polishing, fine processing is not easy to break, suitable for hard tool steel, engraving roughing,strong impact toughness, precision manufacturing. [With Water or Oil ]1.When sharpening the knife, fully use the entire surface with oil or water to maintain the consistency of the surface of the oil stone. 2.the use of attention to the protection of the oil stone, avoid falling from a high place. 3.with the use of sharpening oil for better results. Overview Material : Stone Brand : CBRIGHT Color : Green Product Dimensions : 5.91"L x 1.97"W x 0.59"H Grit Type : Extra Fine Number of Items : 8 Manufacturer : CBRIGHT