The lowest price component in this Owner Tools (ke175-d4) parts-list fiche is the Wrench,open End,10x12.
Some items from this specific schematic: Tool-wrench,box End,2, Screw Driver-#3 Slot, Gasket-liquid,black (nas), Tool-wrench,box,21mm.
In this schematic the "Tool-wrench,open End," is used most often.