Material Steel Closure Type Tee, Prong Color Silver Metal Type Carbon Steel Size M4 M5 M6 M6 M6 About this item 【HIGH QUALITY】: Made of carbon steel, high hardness, corrosion resistance, no rust, smooth surface without burrs, durable. 【DESIGN】: The thread is clear, the tooth-shaped design can expand the area between the nut and the workpiece, non-slip and easy to lock, designated anchored in the wood. 【DIFFERENT SPECIFICATIONS】M4/M5/M6/M8/M10, a total of 105, can be used in different situations or circumstances. 【EASY TO USE】Select appropriate size claw nuts to install; With a storage box to arrange and store according to different sizes. 【MULTIPLE USES】: For professionals, DIYers, carpenters, construction workers, plumbers, 3D printing projects, etc.