Abstract: The teachings herein provide a surgical instrument tray system comprising at least a stringer tray having an advantageous cradle configured to hold ring-handle instruments in a spaced-apart array. In particular, the cradle includes an array of compartments, with each compartment cradling and supporting the lower ring of a respective one of the ring-handle instruments loaded in the tray. Further, a removable, elongated locking member locks the lower rings within the cradle. These features allow the stringer tray to be used for neatly organizing and holding a potentially large quantity of ring-handle instruments, for presentation and use within an operating room environment, for stowage as part of a tracked tray system within a sterilization container, as well as to position and hold the ring-handle instruments in a fully open position for disinfecting and washing.