A collision-resistant tool box has two bodies, a connecting set, a buckle set, and a handle. The lens care kit of the invention allows customers to visually identify when their lenses are disinfected, clean, and ready to wear. The RAID storage controller manages the disk drives of the storage volume to present a single logical volume of storage to the host computer. The switching circuit replaces a damaged one of the n series-connected voltage step-up stages with the at least one replacement stage when a warning signal is received. Two switching transistors are used for each cancellation transistor so that equal sized devices can be used throughout the switch circuit. The housing assembly may further include a pair of spacers configured to maintain a spatial relationship between a first side wall and a second side wall so as to prevent the first and second side walls from squeezing inwardly with respect to each other when the trim piece is displaced from the base.