... in countersunk, checkered or plain head, diamond point, polished.Application: Common nails are used for general construction purpose ... haulm20mm10# x 2-1/2,2Twisted or Plain haulm20mm12# x 2,1-1/2Twisted or Plain haulm18mm13# x 1-3/4,2,1-1/2Twisted ... , annealing , coated, Blue, zinc galvanizedUsage: Construction, walls with staples Common nail Roofing nailConcrete nail bright umbrella head roofing nail