Locks are compatible with the following collars: Andromeda, Ariel, Ceres (discontinued design), Deimos, Dione, Eris (discontinued design), Hydra, Ixion, Luna, Lysithea, Mimas, Miranda (Halloween limited release), Oberon, Pandia, Rhea, Salacia, Titania, and Vanth.
Locks are compatible with any connector cuffs featuring a d-ring.