Material：High quality zinc coated carbon steel. Moisture resistance, oxidation resistance, corrosion resistance.Galvanized materials do not release toxic substances.Environmental protection, non-toxic and pollution-free.High hardness, twice as hard as copper.
Cold heading and thickened. Outstanding grasping power.
The threads are deep and durable. The quality is reliable .The four prongs are strong and uneasy to be damaged.
Simple installation.Suitable for both indoor and outdoor. Used for wood rock climbing wall hold plywood particle board ，loudspeaker board，wooden furniture and other woodworking projects.