Bidragon automatic Umbrella roofing nail making machine can make the nails with the minimum length of 1.5 inches and the maximum length up to 2.5 inches. The nails diameter is ranging from 2.38mm to 3.8mm. Above all, this equipment has the production rate ranges from 110 to 150 pieces per minute and the nails are of reliable quality. Thus, this machine is really the preferred choice for nail making enterprises.