The StarTech.com DRW150SCSIBK, with its high 25K Insertion Rating, is perfect for hot swapping hard drives on mission critical servers, using multiple operating systems or making high-speed, high-capacity backups. This two-piece removable drive enclosure is designed for Ultra320 and 160 68-pin SCSI drives. To protect your important data, the DRW150SCSIBK 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 DRW150SCSIBK is interchangeable with StorCase SCSI 68 pin models S21A107, SC21A107 & Rhino Jr RJR110.