(1) New way to splice rebar dia 12mm-50mm. (2) Made of No. 45 carbon steel. (3) Higher tensile strength, lower cost. rebar coupler 1 made of #45 high quality carbon steel,easy to install and not affected by weather.2 tensile strength can reach 625Mpa, reach 110% of parent rebar 3 thread pitch is 2.5 3.0 3.5,thread pitch 2.5 is used for rebar diameter 14 to 22mm,thread pitch 3.0 is used for rebar ...