The Duro-Last Poly-Plate is manufactured using a glass-filled polycarbonate blend. Polycarbonate has proven weatherability and resiliency. Duro-Last Poly-Plates have 10 "cleats" on the bottom to enhance the wind uplift characteristic of the Duro-Last membrane. Duro-Last Poly-Plates include a recessed hole in the center to prevent the screw head from coming in contact with the Duro-Last Roofing membrane. The Duro-Last Poly-Plate is a long-lasting and durable plate that is available only from Duro-Last, Inc.