Dewalt DNPT28R50G12Z 34° Galvanized Ring Nails 2.8 x 50 mm, 2200 pieces. XR galvanized collated nails for use class 2. Equipped with a D-head, paper collated. Nail thickness 2.8 mm, angle 34°, length 50 mm, carton content 2200 pieces. Service class: What does the Eurocode 5 certification mean? The Eurocode 5 regulations contain a performance standard for nails used in woodwork and roofing. Since July 2013, every yard must comply with the EC5 regulations. EC5 nails are classified into 3 classes: Use class 1: heated interior spaces, use class 2: unheated indoors or sheltered outdoors, use class 3: not protected outdoors or exposed to weather conditions. Dewalt nails comply with the EC5 regulation - each box is clearly labeled and color-coded according to the use class.