Quad Ultrawide Desk Mount: Fits 4 ultra-wide screens (1 up to 49 and 2 up to 38) with VESA 75x75mm or 100x100mm mounting holes. Holds 5.5 lbs to 44 lbs per arm Heavy-Duty Cast Aluminum Construction: Clamp base (fits desktops up to 2 thick) and arms are made of premium cast aluminum for maximum strength, scratch resistance, and durability. High-capacity tilt joints accommodate heavier screens without sagging