Abstract: An adjustable strap includes a flat base having a pair of upstanding tabs and a pair of rectangular slots. A flat rod has opposite ends captured in slots formed in the tabs. A lock member includes a strap-engaging locking part. A harness strap first loop captures a harness swivel hook assembly including a lanyard hook swivelly mounted to a swivel base and a second loop that captures a leading end of the flat base. A handle strap loop engages the second slot. An ambulator swivel hook assembly includes a lanyard hook swivelly mounted to a swivel base that is captured by an ambulator strap loop. The ambulator strap extends through the first rectangular slot, over the flat rod, and back through the first rectangular slot. The leading end cannot pass through the first rectangular slot, preventing the strap from disengaging from the base.