Material: High quality zinc alloy with high hardness. Furniture screws are wear-resistant and very durable to use. Standard internal hex socket without burr and anti-slip. Usage: Pre-drill/drill a proper size hole (suggest the hole diameter is 9.6 +/- 0.2 mm, the length is about 18 mm), then use a 6 mm internal hex tool to screw in (6 mm hex key included). Tip: If the furniture wood has high hardness, please enlarge the screw hole. Applications: Furniture screws are suitable for hardwood/wood furniture, furniture combinations. Thread Type: M6 Total Length: 15mm Outer Diameter: 10.5mm Inner Hexagon: 6mm Material: Zinc Alloy Hex Wrench: 6mm Color: Brass Package Contents: 200 M6 x 15mm Screws 2 x 6mm Hex Wrench Only the above package content, other products are not included. Note: Light shooting 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 +/- 1-3 cm.