SWM201 - Compatibility: speaker mounts fit most 5.5-11 inch width bookshelf and surround sound speakers. The speaker wall mount is built to be mounted on stud, concrete or brick/stone walls. Max capacity: 55 lbs (25 kg). - Versatility: adjustable tilt up and down 7.5 degrees, swivel left and right 45 degrees. Width of speaker should be between 5.5 and 11 inches. SWM202 - Compatibility: dual sound speaker mount brackets built to be mounted on ceiling or wall for maximum compatibility for most bookshelf satellite speakers. - Sturdy construction: the modern design is complemented by a sleek reinforced black coat for a contemporary appearance. Max capacity: 7.7 lbs (3.5 kg). Use scenarios - Install SWM201 on a stud wall in a living room to support a 5.5-11 inch wide bookshelf speaker, then tilt and swivel to direct sound toward seating. - Mount SWM202 brackets on the ceiling to position dual satellite speakers for a surround sound setup in a media room. - Place SWM202 on a wall in a compact space to save floor area while maintaining a clean, contemporary look.