Crystal Turn Locks are stylish and eye-catching. They function as a closure for pockets, flaps, wallets, and bags, but also a sophisticated embellishment with lots of sparkle. Turn Locks are easy to open and close. Just insert the metal turn unit through the opening of the base unit, and twist the turn unit to a vertical position to secure the lock. This style of lock measures 1.6in (40mm) wide by 1.6in (40mm) high.