The LFD front doors (solid steel, fully-vented or smoked Plexiglas) with recessed handles are engineered to work with Lowell 19"W equipment racks in rack series listed. The surface-mount doors feature 180? swing and can be changed from right to left orientation by moving two hinges (factory-installed hinge nutserts on matching Lowell racks help quick changeover). Door extends 1" from rack frame on outside, providing .75" of space from frame on inside to accommodate equipment knobs.