Material: High quality zinc alloy with high hardness. These furniture screws are wear-resistant and durable. Standard internal hex socket design, burr-free and non-slip. Usage: Pre-drill a hole with a diameter of 9.6 +/- 0.2mm and depth of approximately 18mm. Use a 6mm internal hex tool to install (6mm hex spanner included). If the furniture wood is high-density, consider enlarging the screw hole. Applications: Suitable for hardwood and solid wood furniture assembly and connections. Thread Type: M6 Total Length: 15mm External Diameter: 10.5mm Internal Hex: 6mm Material: Zinc alloy Hex Spanner: 6mm Color: Brass Package Contents: 100 x M6x15mm screws 1 x 6mm hex spanner Note: The package includes only the items listed above. Other products are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error is +/- 1-3cm.