I searched for "duck spanner" and it showed me these oddly-shaped things.
<br /><a href='https://www.amazon.com/Mdvora-Coilover-Spanner-Suspension-Adjustment/dp/B0C5BQLDHZ'>https://www.amazon.com/Mdvora-Coilover-Spanner-Suspension-Adjustment/dp/B0C5BQLDHZ</a>