A good home for your mobo: Based on ATX form factor motherboard specifications providing a full 8x13” of surface area. Resting on its anti-static mat and its AGP/PCI cards securely locked in place with thumbscrews, the motherboard is safe yet available for some hands-on work! Top shelf, load it up: The upper shelf is for stacking the drives and power supply. Plenty of real estate here to hold optical, hard disk and floppy drives. The motherboard is protected from any possible impact from above since it’s covered by the top shelf on the test bench. Included are non-slip pads to keep things in place, and the bench can hold over 150 lbs!.