the BT77 is suitable for most speakers including curved front types. Clamps speakers at the side using Ultra grip high friction pads. Swivels left or right a full 180°. Tilts down 7° or up 7°. Accepts speakers from 5 1/2" (135mm) to 11" (280mm) wide with a maximum depth of 13" (330mm) and height of 20" (510mm). Full metal construction to accommodate weights  to 55 lbs. (22 kgs.) Slim wall plate ideal for all wall types including stud mounting. Simple adjustment - one 13mm locking nut secures tilt & swivel. Available colors: Black or Silver