Clockspring is also called rotation connector, airbag spring or spiral cable, used for connect main airbag and airbag harness, or the switch buttons on steering wheel and harness for control unit. Clockspring is normally assembled in the room between steering wheel and steering column stalk switch. In order to guarantee the electricity transmission for airbag detonator and ECU igniter, it moves with steering wheel on driving condition. It guarantees reliable electricity connection for the moving parts of steering wheel and steering column.