Detailed Product Description 1)Specifications:a) Nails head: 6.4 x 2.2mm b) Shank diameter: 2.20 c) Length: 18 - 64mm (3/4 - 2 x 1/2")2) Models: ST18, ST25, ST32, ST38, ST45, ST50, ST57 ST643) Mainly used in nailing concrete, batten or plate iron, fixing batten with solid concrete, fixing plate iron with solid concrete, beating into metal frame over 1mm in thickness and used in nailing floors and ...