Halter Dual Pair Adjustable Wall Mounting Surround Sound Speaker Mounts Bracket Clamp Style w/Tilt & Swivel 360&deg; Rotation - Set of 2 A pair (2) of side clamping loud speaker mount Suitable for concrete, brick and wood stud walls Clamp adjusts from 5.4 to 11.7 inches, Supports up to 55 lbs Easy Install, swivels 360 degrees and 15 degrees tilts adjustable [7.5 Up & 7.5 Down] Standard mounting hardware and user manual included Heavy duty steel construction with wall plate cover.