Kingwin 4 x 2.5-Inch Tray-less Hot Swap Rack for SATA Components Other KF-254-BK Patent NSS connector protects the HDD 50,000 times insertion rate Supports hot swap Supports SATA III (6.0 Gb/s) Tool-less design for H.D.D. installation Key lock system for added security Driver-free support Special handle latch design