StarSide 2PCS Vertical Surface J-Hook Buckle Mount for GoPro Hero 2 3 Chest Mount Strap Belt The J Hook mount allows you to attach your GoPro camera to a Chest Harness or Adhesive Helmet Mount. The surface J-Hook Mount specially for GoPro HD Hero Original Hero 2 Hero 3 3+ Camera by holding your Gopro Hero Series and making your usage convenient. Made of superior quality material, it is durable and stable. A good choice for your chest belt strap and helmet!