This is a quality solid brass split ring.
This ring is made from a brass flat bar by skilled Japanese craftsmen.
They made it by bending a flat bar rather than pressing it.
If you put a key through direct to a split ring,
3.5mm ~ 4.5mm in diameter of the hole of the key is necessary.
Material / Solid brass
Color / Matte black plated
Size / 27 mm diameter x 2.8 mm x 3 mm width
Weight / 5.5 g
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