The BT77 is suitable for most speakers including curved front types. It clamps speakers at the side using ultra grip high friction pads. It accepts speakers from 5 1/2" (135mm) to 11" (280mm) wide with a maximum depth of 13" (330mm) and height of 20" (510mm). Featuring full metal construction to accommodate weights to 55lbs (22kgs), its slim wall plate is ideal for all wall types including stud mounting. Simple adjustment - one 13mm locking nut secures tilt and swivel.