Eco-wpcfence --Nail holding force:3111N --Screw holding :2733N --Rockwell hardness:73HRR -- Certification: ISO9001, CE,ASTM It looks, smells and handles like wood but has the durability of plastic---------environment friendly and low maintenanceThe eco-friendly Wood Plastic Composite ( WPC ) we produced is made of :30% HDPE (Grade A Recycled HDPE)60% bamboo /wood fibre (professionally treated dry ...