1. Camera knurled screw: suitable for cameras, ball heads, mirror plates, telescopes, quick-release plates, and camera hanging sets. Knurled grip enables easy hand tightening for secure mounting. 2. Screw-on camera mounting: simple and fast connection and release system. Improves the connection between camera and the quick-release neck strap, and supports camera safety straps. 3. Camera mounting screws: 1/4-inch screw to attach your camera with a hand strap, shoulder strap, or neck strap. Provides a reliable camera strap screw connection. 4. Camera shoulder strap screw: suitable for gifting to photography enthusiasts, such as family and friends. Thumb screw camera compatibility for quick strap attachment. Use scenarios - Quick setup on tripods or heads: use the knurled screw to securely attach a camera to ball heads or quick-release plates, enabling fast in-field changes. - Active shooting and travel: attach the camera to hand, shoulder, or neck straps with the mounting screws to keep the camera secure while moving between shots or locations. - Gift and sharing: give to photography-loving family and friends as a practical accessory that simplifies camera attachment and strap setup.