Features:

• Rockville RAIL12U 12U Reversible Rack Rails With M5 Circle or Square Screw Holes
• Product Dimension: 2.25" x 1" x 23.5"
• Product Weight: 1.43 lbs.
•  Replace or upgrade the rack rails in any standard 6U Rack
• Use the circle M5 holes if you prefer to just screw your gear right into the rack quickly
• Use the square holes if you want to protect your gear and install with screw and cage nuts’