Rebar Couplers are used to join end-to-end of TMT Bar to create a continuous Rebar length without losing its strength. Rebar Coupler is made up of EN8D Material which gives Tensile strength of 650 mpa. In Construction, TMT bar is used to joined using a Coupler sleeve that transfers the force on the rebar. Rebar couplers are used in reinforced concrete structures to replace normal rebar lap joints. The couplers are also suitable for use in reinforced concrete columns and walls. Each rebar coupler consists of a piece of rebar equipped with a thread and coupler sleeve at the right end as viewed in the direction of installation. In construction joints, rebar couplers can be used to replace all pieces of rebar going through the formwork.