k or ring shanks, flat top or umbrella head. Hot dipped galvanized roofing nails with umbrella head and ring shanks are durable and firmly fixed, especially suitable for tropical areas house buildings. For the following reasons: First, Different shank types offer various properties for the roofing nails and give different application effects. Twist ring shank nails are used extensively in post fram construction due to their superior performance. It had approximately twice the withdrawal resistan