?Package included?: This desk wire organizer includes 1 * cable management tray, 4 * straps, 7 * screws, 7 * nuts, 1 * screwdriver and 1*Installation instructions. ?Installation: Inward or Outward?: The double desktop cable manager offers flexible installation - inward to hide cables or outward for easy access. Adjustable knob design allows for wider use on glass, essentials or marble tables. ?High Heat Dissipation Effect?: desk cord organizer is made of high quality carbon steel, hard and wear-resistant, hollow structure design can effectively reduce the accumulation of dust, while maintaining good air permeability, high heat dissipation efficiency, to avoid overheating of wires or plugs. ?Unique Snap-on Anti-slip Design?: This under desk cable tray has 2 oversized holes in the middle, which can be directly put the power strip into, both sides are equipped with multiple anti-slip holes to make its cables not easy to slip off, large capacity space to accommodate adapters, cables and multiple power strip. ?Expandable Design?: under desk cable management, after rotating the button, you can directly extend the length of the tray from 17.1" to 27.56", no need to disassemble, more convenient to use and operate. Double stacking at the retractable interface makes it thicker and more resistant to deformation. ?No Drill?:Our desk wire management tray adopts no-drill design, won't cause any damage to the desktop, with extra wide retaining clips, load bearing can be as high as 45LBS, suitable for 0.2-1.96 inches desktop thickness, you just need to fasten the cable tray to the desktop and tighten the clips can be used.