Recessed and concealed lockprotectors for maximum security against drilling and cutting lock. (Model 1332 one lock protector only). Enhanced lid bolster for added support and durability. Finger-groove lid handle for easy opening. Convenient storage tray onback wall for small items (except Models 1332, 1636 and 2142). Steel support arm(s) to hold lid in open position. Heavy-duty piano hinges with non-removable pin. Patented, ergonomically designed fold-down recessed handles. New angled 3-1/2 IN high support skids feature threaded holes for easy caster installation. Recommend #1 and #5 Masterlock padlocks or equivalent