Roofing nail with twisted shank (anchor). Roofing nail with twisted shank (ANCHOR)Head: Round head with groove shank , roofing nails .Material:steel , low carbon steel , stainless steel .Size & Lenth :all kinds of applicationStandard: twisted nails.Finish surface : black , zinc plated , yellow zinc plated , plain , hot dip galvanizedPacking : box packing , bulk , 25kgs/ctn . umbrella head Roofing ...