DBI-SALA Adjustable Offset Upper Mast for Advanced Davit - 23-1/2” to 42-1/2”* The telescoping reach of 23 1 2" to 42 1 2" of this davit arm ensures mechanical device lifeline(s) remain centered over the confined space. * This upper davit mast is designed to work with a lower extension as part of a complete davit system for confined space applications. * The built in primary and secondary pulleys route the lifelines of two mechanical devices for smooth, efficient rescue and work support operations. * The quick mount detent