Premium grade 304 stainless steel provides maximum corrosion resistance and eliminates stains and streaks on lumber. Sinker heads drive flush with work surface. Checkered pattern on head blends with wood grain and reduces glare from sun. Annular ring shank for stronger holding power in seasoned wood to help prevent nail heads from popping up. Larger shank diameter easily penetrates both green and seasoned preservative-treated pine. Ideal for decks and docks. Blunt diamond point.