Mac Pro [2006-2008] Sleds Kit(2 Pcs) for 3.5" Drives MAKES DRIVES SWAPPABLE: Easily replace or exchange drives* as easily as you would a USB. PORTABLE STORAGE SPACE: No Data cables and power cords are required! SAS/SATA HDD COMPATIBLE: Works with both 3.5 SAS and SATA Hard Disk Drives. PERFECT FOR HIGH VOLUME SETUPS: Reliable and Made in the USA, these pro sleds provide an easy fix to data storage space shortages LIFETIME WARRANTY: Manufacturer guaranteed to last a lifetime.