These M10 D-Type insert nuts are designed for wood and provide a strong, permanent thread. They are ideal for various furniture applications, including sofas, chairs, settees, beds, footstools, cabinets, tables, bookcases, and drawers. The nuts come with different fittings, some with bolts in M8, M10, and M6 sizes, and others are self-fixing with pre-drilled holes for 6mm wood screws. Ensure you order the correct bolt size by checking the existing legs; a tape measure is not accurate for thread measurement. The best method is to try a nut on the existing leg: an 8mm nut that fits indicates M8, too small suggests M10, and too big requires M6. For advice or help with fittings, please send a message, and we can suggest suitable options for your requirements.