Non-Rust Stainless Steel 304 Spring Snap Hook Carabiner Screw Lock- 3 inch - Key Ring Hook with Spring Loaded Gate/Camping, Traveling, Hiking&hellip;etc&hellip;Set of 4 (not to be used for climbing) Package contents: 4x lock carabiner hooks, 3 inch Stainless steel screw locking carabiner key ring, key-chain, snap, hookand for any outdoor equipment gear...( not for climbing) Added security of screw lock mechanism to keep closed and load secure. Material: Made of 304 stainless steel that protects against corrosion Versatile binding, rigging & anchoring hardware - quick connect/dis-connect of ropes