Imported (from EU - not Far East) snapgate Mini Carabiners, 2 3/8 inches long (6cm).

Hardened alloy for a long service life. Smooth matte anodized finish. The gate has a strong spring and a chunky rivet.
Sometimes they're a keyhole shape, rather than as shown above.
Weight: about a third of an ounce - 9.5 grams.

Colors as shown - used routinely by falconers since at least 1996