The 3I-3021-18BS Bose F1 Subwoofer Case also features three protected hinges with stainless steel pins to provide lid stability, SKB’s “trigger release” latch system that can be retrofitted with TSA recognized and accepted locks, an oversized double grip carrying handle to balance a heavy load, and comfortable oversized snap-down rubber over-molded cushion grip handles on each end for a two person carry or transport as well as wide-set double wheels for your convenience.