Features: Premium metal Hard drive/Solid disk mounting bracket securely holds both 2.5" and 3.5" drives with anti slip grip and compatibility for effortless PC case storage expansion. Features single screw fixation, horizontal/vertical orientation option with padding for vibrating resistance and optimized heat dissipation in desktop . Essential for PC builders, gamers, and workstation users seeking organized drive management without sacrificing chassis airflows or structural integrity. Streamlines storage upgrades in customization built PC server racks, or compact office computers requiring multi drive configurations. Engineered with reinforced metal framing and scratch resistant coating to protect drives during intensive operations while maintaining minimalist aesthetics. Specifications: Item: Desktop Computer Mechanical Solid Disk Drive Card Slot Expansion Rack Applicable model: 2.5inch/3.5inch hard disk Color: Black/White Component: Metal Size：about 13.7x14.7x1.3cm/5.4x5.8x0.51in for 3.5inch； 12x9.4x2.2cm/4.72x3.7x0.87in Full Height ; 8x9.4x2.2cm/3.15x3.7x0.87in Half Height Package Includes: 1PC Computer hard drive expansion shelf note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.