Pinpoint oiling is easy with the Needle Oiler by Kings County Tools. This oil pen features solid aluminum casing, a steel internal needle, and rubber gaskets to seal the case at both ends. Just press the thumb button at the top of the precision oiler pen once to deliver a drop of oil precisely where it's needed. To fill the oiling pen, screw the top off and fill the reservoir with 0.2oz (5mL) of lubricating oil. This multifunction oiler can be used for a variety of household tasks including watch repair, oiling door hinges, lubricating knives, drills, or gears, and firearm maintenance. These oil pens are great to have on hand and make fun stocking stuffers or Christmas gifts for men.