Hand Tool: Used to split hard stone, rock, granite, marble, and concrete Diameter: 5/8 inch (16mm) (compatible with 1/2 inch hammer bits) Size: Please refer to picture Heat-treated for high hardness and toughness Color: Black Material: Metal How to use: 1. Consists of one central wedge and two side wedges 2. Drill holes using a quarrying-specific drill bit, then remove residual powder from the hole 3. Insert the two side wedges into the hole with the wide ends facing down (flat sides together) 4. Insert the central wedge (narrow end first) between the two side wedges 5. Use a hammer to drive in the central wedge to split the stone Packing List: 10 x Wedge and Feather Sets Note: - Always take necessary protective measures before use - Stay alert when the stone is about to split - Package includes only the items listed; other products are not included - Due to lighting and display differences, the actual color may vary slightly from the image - Measurement error allowed: +/- 1-3 cm