SIZE: Length of twist lock: 3.5 cm /1.37 inch diameter of split ring: 2.5cm / 1 inch. The sizes easily adapt to your regular needs. These Snap Swivel Locking Snap Hooks are suitable for dog leashes, bag straps, personalized key fobs and jewelry. . A HIGH QUALITY ZINC ALLOY: Professionally designed from a high quality zinc alloy. Strong and stable yet lightweight, you can attach multiple keys and fobs to the carabiner without overloading it. . SECURE MOUNTING: Simply press and hold the trigger to open and release the clasp, and it will close automatically. Not much pressure is required to avoid finger injury even with regular use. . FLEXIBILITY OF THE SWIVEL: The swivel latches offer maximum 360 flexibility, are easy to operate and can be rotated in any direction. . SMALL KEYCHAIN SET: Can be used for children's art projects, hanging curtains, and displaying photos. The creative possibilities are endless. The rotating metal clamp opening makes it easy to use clamps and keeps them firmly in place. .