Material: stainless steel for durability and corrosion resistance. Key features - Double-ended bolt snap hooks with swivel clasp: 360-degree rotation to prevent tangles, enhancing pet comfort; includes a double-ended hook design for versatile use. - Dog leash clip: double-ended design provides versatility for various walking and training scenarios; compatible with chain leashes for large dogs. - 360-degree swivel hook: prevents tangling and twisting, allowing more movement for your pets; includes a double lobster clasp and metal snap hook. - Snap hooks size and build: stainless steel, 89 mm double-headed hook for reliable handling of energetic pets; features double trigger clips. Use scenarios - Walking two dogs with a single leash or dual-ended setup to reduce tangling during strolls. - Training sessions that require quick clip-on/off changes and secure connections without twisting. - Suitable for large or energetic dogs, including use with chain leashes, where strong, reliable hardware is needed.