• Premium material: Made of high-strength nickel-plated iron, these M4 connecting screws and bolts are strong, corrosion-resistant, and high-temperature resistant. • Easy to use: Includes threaded sleeve and threaded screw, ideal for connecting furniture parts. Simply drill holes, insert the screws, and tighten with a Phillips screwdriver. • Practical design: The serrated edges of the connecting sleeves prevent twisting, providing a stable and secure connection. • Wide applications: Suitable for installing and repairing door handles and furniture panels with a thickness of 31-40 mm. Perfect for doors, beds, cabinets, drawers, and shelves in bedrooms, kitchens, living rooms, schools, and offices. • Package contents: 75 furniture screws, 75 connecting sleeves, 1 screwdriver, and 1 storage box for easy use, transport, and organization. • Product dimensions: Width: 9.8 cm, Height: 2.3 cm, Length: 17.3 cm, Weight: 0.001 kg.