Description: 3.5" to 5.25" Hard Drive Bay Metal Mounting Bracket Adapter Kit Dock Holder. Internal 3.5" to 5.25" HDD Metal Mounting Kit Quick and easy installation. Compatible with all types of 3.5" hard drives for use in 5.25" internal drive bay. Maximize space within your computer case. Specification: Size: approx. 92*22*24mm/3.6*0.86*0.94inch Package Includes: 1 Piece 3.5in to 5.25in HDD Bracket Note: The hard drive is not included