Mechanical Pencils
A mechanical pencil is a mechanical writing instrument that comes out and writes only an elongated core made of graphite like a pencil. Abbreviations are mechanical pens, etc. Within the click-types, the core is pulled out several millimeters from the tip by pressing the click button on the rear end made of graphite. There is also a pendulum type in which the core is extended just by vertically shaking the mechanical pencil without pressing the click button. In addition, there are products where the tip of the lead rotates a little bit each time you write, the tip of the lead is always conical and can be written with a certain thickness, those with little residual core that you can use to write for long periods of time with one piece of lead, etc. A mechanical pencil requires a sharp lead and the concentration varies depending on the hardness of the lead, so the product must be selected for the application.