Professional caretakers use drops of lubricant constantly in their work environment, e.g., schools, museums, administrative buildings, hotels and other properties. Maintenance of locks and fittings as well as machinery in the plant room now becomes a clean and easy job. No wastage and wiping away of excess oil, no long walks to get the big oiler can from the workshop. The handy Precision Oiler Pen fits cleanly and comfortably in every caretaker´s shirt pocket or smock.