Concrete steel nails SpecsModel: 13#,16#,20#,25#,30#,35#,40#,50#,60#,70#,80#,90#,100#,130# Length:13mm-130mm Concrete steel Nail:SpecsModel: 13#,16#,20#,25#,30#,35#,40#,50#,60#,70#,80#,90#,100#,130# Technical Standards: Length:13mm-130mmShank Diameter:1.60mm-5.50mm Product Description: Bulk Nails,With diamond point. Finish:Bright and E.G Shank:Grooved