1. Central wedge + 2 wedges composition2. First using quarrying dedicated drill holes, remove residual powder of hole3. upside down the big side of 2 wedges (flat to flat),and put it into hole4. Then upside down the small side of central wedge between 2 wedges , and finally using the hammer split stoneColour: Blackmaterial: metalSize: Diameter 9/16inch (14 mm), Length 125 mmSuitable for Splitting the hard stone,rock,granite,concreteHigh-quality steel, heat treatment process, High hardness, toughness, low cost, cost, versatility, easy to usePlease keep it out of reach of children and safety firstPackage Content: 10* stone Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.