An anti-theft assembly for deterring theft of a ring is provided. The anti-theft assembly includes a base that can be used to support an electronic article surveillance marker; a product engagement member including a support member that supports the ring during use and a locking member that secures the support member to the base; and an attachment member for securing the ring to the support member. In one embodiment, the support member and the locking member are a single, unitary member. In another embodiment, the support member and the locking member are separate members. Once assembled, upon applying a twisting force to the ring the engagement member rotates within the opening so that the attachment member is not broken.