Rebar coupler is used to connect the two rebar ends in the construction work. 1. Easy Operation, saving time and rebar material. The rebar coupler producing and rebar end threading will not be affected by the weather; it can be processed before processing. 2. It can connect the rebar with the diameter 14mm to 40mm. 3. Use No.45 steel, with the thickness and length of the rebar coupler, the connecting part has higher tensile strength than the rebar part. size16-40mm.