The protective sleeve made of silicone is split so you do not have to remove the complete sleeve from the HDD in order to plug it into a QuickPort. Only take away the sleeve's part covering the hard disk's connector before usage and replace it afterwards. While not in use the hard disk will safely protect be lying in your cupboard waiting for its next mission. The Quick Protect is made of durable silicone material and fits any 3.5" hard disk drive - IDE as well as SATA.