ADJUSTABLE MOUNTING: Center-mounted shelf with configurable position along the mounting bracket for flexible setups HIGH WEIGHT CAPACITY: Supports up to 150 lbs perfect for heavy electronic equipment SOLID DESIGN: 20-inch depth with adjustable or removable flanges for securing equipment; mountable upside down for unique configurations COMPATIBILITY: Fits 2-post racks with 3 to 8-inch uprights; compatible with square round and threaded holes EIA STANDARD: Designed for EIA 19-inch relay and telecommunications racks; includes slots for securing equipment with straps