The package contains only 1 screw clip, no other parts. The design is sturdy and durable, waterproof and sunscreen, suitable for all kinds of weather and environment, not easy to fall off. This is a backup, you no longer need to replace the screw clip of this helmet with another. It is specially designed for Bluetooth intercom and some motorcyclists' backups. It is suitable for any full helmet, half helmet, flip helmet, most of the open helmets that can cover the ears. Suitable for screw clamps of T-COMVB, T-COMSC series motorcycle helmet Bluetooth intercom.