30" Long Extension Arm: Long extension TV mount extends 30" from wall to cover more viewing positions, and retract 3" to wall to save space for a clean look. The long extend and swivel function allows to watch TV wherever you're seated. Corner TV Wall Mount: YD3037 fits most 42"-75" TVs with VESA patterns from 150x100mm to 600x400mm, holding up to 99 lbs. Please CHECK TV weight, size, VESA, and input access before purchase. Universal Brackets: YD5012 soundbar tv mount is compatible with soundbars with or without mounting holes up to 15 lbs including those from Samsung, Polk, Sony, Yamaha, Vizio, Bose, JBL and more. The extra long 31.5" vertical bracket fits most large TVs with VESA up to 800x600mm. Multiple Installations: This soundbar mount bracket has 4 installation options: Mount with TV wall mount brackets, directly mount above TV, mount on wood studs, mount on concrete/brick wall with concrete anchors included. Flexible Holder: The 6.5" L-bracket holder can swivel +/-90° to fit soundbars of different width or odd shape. Designed with the long nuts, it hold soundbars without holes and protect soundbar from falling.