... low carbon steel Q195 or Q215 or Q2352. Finish : Good polished, flat head, diamond point, hot-galvanized/electro-galvanized, smooth shank ... boat nail, corrugated nails, felt nails, drywall nails, drilling nails, self tapping screws, etc. A variety of nail products in good ... " 5" Packing:1.33kg per box,16boxes to one carton self drill-screw