Techs toolbox.Well we had them on "Coastal"wooden box lockable in which all sorts were kept.Working first line you didn't need them as centralised servicing took over .In fact all you needed was a G.S.scredriver for most jobs!! Of course you did a variety of jobs most of them dirty ,ie topping up oil,15 gallons per engine per day on Varsities !Refuelling ,towing trolleyaccs putting away in the hangar as not enough room on the line.Could go but!!
Of course this was the 1960s and I am sure things have progressed a bit since then. Fire piquet and duty elect ,does this still have to be done?