Galvanized round wire roofing batten nails - 65mm x 2.65mm This product is a 1kg pack of galvanised round wire roofing batten nails, with dimensions of 65mm x 2.65mm. It is important that they are 65mm long, as this ensures there is around 40mm of roofing nail within the batten to ensure a secure and long lasting connection. These round wire roofing batten nails are most commonly used to secure roof tiles and slate tiles to the roof battens. Approximately 311 nails per kg.