Usage Tips:Features: DIY Use: It can be the replacement once your sling strap parts broken down.Of course,you can DIY it to work with other strap you have. Easy to use: You can quickly put on or off your camera strap without wasting for time to mess around the strap and its parts. Package includes: 2pcs 1/4-inch digital camera attachment shoulder strap screws, 2pcs Black Rapid safety question mark hook safety lock, SLR camera quick shot shoulder strap hook. Safe and stable: The safety question mark hook is made of high-strength steel and covered with black nickel metal. This hook is for stronger, rotates more smoothly, and has a lock to ensure the safety of the camera. brand and high quality High Quality: The 1/4 quick-release screw is finished in black nickel, the solid design provides a positive connection point while perfecting the quick and easy attachment and release system. Specifications: Material: Metal Maximum load: 2-5 kg Package Includes: 2x Screws 2x Hooks note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.