Straight Shank 1"-4" Concrete Nail Material:45# steel Size:1"-4" Shank:smooth,longitudinal,twisted groove Color box Straight Shank 1"-4" Concrete NailConcrete and ... .5"-3"-4")Diameter: 1.6mm-5.5mmShank: smooth, longitudinal groove, twisted groove, angular spiralHead: headless,flat head,countersunk head,K type,T ... : 1"-4"1"x3.0mm 1.5"x3.2mm 2"x3.6mm 2.5"x4.0mm 3"x4.2mm 4"x4.5mmAlso the diameter can be ...