As a Las Vegas Realtor®, I often find need of tools, tape, etc. About a year or so ago I put together a makeshift "Realtor Kit". It has screw drivers, duct tape, tape measure, pocket knifes, flashlight, pliers, sharpie markers, among other commonly used items.
I found that while showing homes or taking a listing or piecing together a project in the office there was consistent need for handy tools. I looked around for a kit specific to real estate agents but couldn't find anything. I'll bet someone could make a little business out of supplying agents with ready made kits.