Four-sided sharpening: You will receive the sharpening stone with different sides 400# 600# 1000# 1200#, the 400#-600# side is for coarse sharpening and the 1000#-1200# side is for fine sharpening. These sharpening stone kits are small in size and light in weight, so they are easy to carry. Unique design: The unique honeycomb design ensures that the dust generated during the grinding process will not affect the sharpening. The diamond sharpening stone has a non-slip base to prevent it from slipping during use. Reliable material: These knife sharpening stones have great practicality and durability because they are made of diamond. Due to the high hardness of the material and the low loss during use, our sharpening stone can be used for a long time. Convenient to use: You only need to place the knife on the sharpening stone and move it back and forth several times while maintaining an angle of about 30. You can always add water to it during sharpening, which makes the lubricating effect of grinding excellent. Various applications: The sharpening stone set is very suitable for grinding family and outdoor kitchen tools, wood chisels, jade, seals or carving knives. Size About 15 x 6.3 cm, thickness 3 mm.