Bar Locking Transition Coupler is designed to join different diameter bars in a way that the tensile strength of the joint matches requirement for tensile failure of smaller diameter bar. J B Engineering Corporation, an ISO 9001-2008 recognised supplies Bar Locking Transition Coupler. J B Engineering Corporation is the manufacturer of Bar Couplers, Mechanical Splicing, Reinforcing steel bar, straight screw thread connections, Rock-Bolts Accessories, Washers-Expansion Shells, Construction Equipments, Grout Pumps and Pan Mixtures. The Bar Locking Transition Coupler is available in various specifications with diameter sizes of 16 mm, 20 mm, 25 mm, 28 mm and 32 mm.