Phillips Double Csk Flat Head Harden Chipboard Screws 

These screws are made from a high quality black steel.The screws are treated so they resist rust and corrosion.They are high strength and will not deform or break under normal use.The aggressive screw twist pattern allows you to drive them fast and to complete your project efficiently and quickly.Our company is specialized in making fasteners, we can provide a variety of bolt,nut,anchor.like:hex bolt,hex nut ,wire rope.We have our own warehouse, standing stock, we can open molds to make products through the drawings provided by customers.we provide the best service.