① Ribbed design for anchoring reinforcement : A rib is formed at the point where the circular shape and the spanner slot meet, creating a circumferential gap similar to the rib of the rebar. This enhances the adhesion and attachment of the concrete.

② Strength reinforcement ring : A circular reinforcement ring is formed in the center to reinforce the strength, and it is designed to prevent tools from slipping during installation with the use of pipe wrenches and chain wrenches, which helps prevent accidents.

③ Spanner slots of various shapes

④ Manufacturer and specification marking : The company name and rebar specifications are marked to ensure traceability.

1. New technology No. 296 of the Ministry of Land, Infrastructure and Transport

2. NT (New Technology) No. 1999-046 of the Ministry of Trade, Industry and Energy

3. Patent No. 316435

4. Rebar is not heated and not swelled (UP-SETTING) or cut.

5. The tensile and compressive forces are secured as well as the inherent ductility of the rebar through ambient temperature swaging.

6. The length and outer diameter of the coupler are small, making it easy to install concrete.

7. The same cross-section joint arrangement.