ADJUSTABLE DEPTH: Allows for easy installation depth adjustments for server racks that are too long or short ensuring optimal equipment fit. HIGHLY COMPATIBLE: Works with square threaded and round holes in most 4-post racks providing versatile installation options. SUPPORTS MULTIPLE SIZES: Available in five sizes to cover all common needs with a weight capacity rated at 50 lbs per rack unit. MODULAR DESIGN: Brackets can be combined to mount larger equipment safely supporting up to 7U configurations. UNIVERSAL COMPATIBILITY: Compatible with leading OEM brands ensuring reliable performance in diverse rack environments.