The Triad-Orbit SM-WM1 mounting plate mounts to ceiling and walls.
It has an insert that is compatible with Triad-Orbit SM-PM1 (ACC0009830-000) and SM-SW1 (ACC0009831-000). The slide-in has the advantage of providing a convenient mounting device when the plate is mounted to a suitable surface. Speakers already attached to mounting plates can be easily suspended.