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.