[2 in 1 Super Hard Ruby and Natural Stone] Double-sided sharpening stone in different materials and grits, even the hardest steel knives can be sharpened sharp. The ruby whetstone side : 3000# .The other side of natural agate oilstone: 10000# . [Small and Exquisite Sharpening Stone] THE STONE IS A MINI SHARPENING STONE - STONE SIZE: 50mm x 25mm x10mm (2x1x0.4inch)PLEASE PAY YOUR ATTENTION ON ITS TINY SIZE AND ITS GRIT SIZE! Comes with a Whether outdoor or home are very convenient to use, you can always grind and polish your knives, home knives folding knife outdoor shovel, etc. [The Sided of Ruby stone 3000# ] The sharpening stone is made of high-temperature sintering, with high hardness and strength, with almost not easy to wear the surface, high hardness, suitable for processing high toughness quenched steel, alloy steel, precision gauges and instrument parts and other workpiece with high requirements for finish or tool sharpening and repairing workpieces. [The Sided of Natural Agate stone 10000#] The stone formed naturally in translucent color , very fine and uniform texture, with strong hardness and strength. [Notes of Sharpening ]The stone only need to add a few drops of water when sharpening, the sharpened edge is very sharp, suitable for tool opening and fine grinding. After sharpening the knife, wipe with a warm cloth or rinse with water.Can be directly rinsed with water, put in a ventilated place to dry. Each quipped with a small drawstring bag, easy to carry. Each quipped with a small drawstring bag, easy to carry. LOOK FIRST PLEASE: THE STONE IS A MINI SHARPENING STONE -CHECK THE SIZE FIRST -WHETHER IS FITTING FOR YOUR USING OR NOT - PLEASE PAY YOUR ATTENTION ON ITS TINY SIZE AND ITS GRIT SIZE! DESCRIPTION: STONE SIZE: 50mm x 25mm x10mm (about 2x1x0.4inch)-The small size makes it portable and handy. MATERIAL: 1. Red: (3000-4000#)-Ruby Whetstone having high hardness and strength, rose red color,delicate and tight structure,not easy to wear the surface,high hardness. OCCASION---Ruby Whetstone - Polished and Sharpened :suitable for processing high toughness hardened steel,alloy steel,precision measuring instruments and instrumentation parts, such as higher finish requirements of the workpiece. 2.White: (8000-10000#)- Natural agate oilstone,texture is very delicate and uniform,has a strong hardness and strength, Almost not easy to wear. OCCASION--Natural agate oilstone - Fine Sharpening: main application in Jade instrument industry, precision parts, precious stones, measuring tools, cutting tools, instruments, cemented carbide and other aspects of the fine polishing. PACKAGE INCLUDED: 1PC Dual-Sides sharpening stone