SKB 3SKB-R906U24 - 6-Space 24-inch Deep rSeries Shock Rack24" 3SKB Roto Shock Racks feature a standard depth of 24" from front to rear rail, with lid depths of 4. 5" per lid. All 3SKB Series Roto Shock Racks feature a compound hinge system that allows the lid to swing out and completely around to lie flat against the main body of the case. This also enables effortless removal reinstallation of the lid with a simple lift motion. Both front and rear lids are designed to protrude into the base of the case