... in the nail&screw,including drywall screw, chipboard screw, self tapping/drilling screw, common nail, concrete nail, duplex ... nail, finishing nail, roofing nail with umbrella head, roofing nail with flat head, boat nail, coil common nail ... Standard, British Standard, with surface treatments as customer's requirement, including galvanization(Blue Zinc, Red Zinc, Waxing),Nickel-Plating,Phosphorus ...