The StarTech.com DRW150SCABK, with its high 25K Insertion Rating, is perfect for hot swapping hard drives in RAID implementations, using multiple operating systems or making high-speed, high-capacity backups. This two-piece removable drive enclosure is designed to hold Ultra 320 and 160 80-pin SCA drives. To protect your important data, the DRW150SCABK features a locking mechanism to prevent the drive from being accidentally removed while in use, plus over temperature and fan failure alarms. Two dual ball bearing fans keep air flowing through the case, helping to keep your drive temperatures at optimum levels. The DRW150SCABK is interchangeable with StorCase SCSI 80 pin SCA models S21A110 & SC21A110, and model RJR110.