This does not affect your right to an exchange or refund for faulty equipment.
Shackles on both sides of the swivel allows fitting to fixed eyes on either end creating a rotational element that takes up less height in a system than most connectors do. Available in three configurations depending on the user's requirements.
The small D shaped shackle keeps inline attachments neat & predictable whereas the increased size of the bow-shaped shackle allows more complex set ups by catering for loading across the shackle. A combination of both is also available.