The products has been used in pre-tension or post-tension for concrete constructions and building materials.It can be used to lock the steel strand wires under grade of 2000Mpa standard strength,which diameters are usually 12.7mm\12.9mm\15.2mm\15.7mm.And also can be used for the wires and strands as per ASTM\BS\JIS\JIG\AS and other standards only if its technical parameters shall match the related detail materials.