How to install WPC products？

Use an electric-drill to drill holes on the external side of the first grooved decking, then screw in stainless nail to fix the decking to the keels. Plastic fitting have to be placed to the groove sides of the decking on line between every two decks. After finish arrangement of both the decking and the plastic fittings, two people at the opposite side of the boards, pushing the boards together to make the boards lean to each other firmly. Then screw in the stainless nails to all of the plastic fittings, which have a hole in the middle.