Features: - SS plate with high quality diamond coating. - Coarse & fine or super fine in one set. - Coarse side,400#; super fine side,1000#. Super fine is best for ceramic . - High quality plastic base with non-slip feet for safety. - Diamond grindstone, lightweight and easy to carry. - Suitable for family kitchen tool sharpening, woodworking chisel, jade, seals, or carving knives. - Double side grinding ,convenient and portable. Specification: Material: Diamond, Plastic Diamond Color: Silver Base Color: Black Diamond Size: 155x65mm/6.10x2.56" Base Size: 178x88mm/7.00x3.46" Package included: 1 x Diamond Double-sided Sharpening Stone