This is a click ballpoint pen with spring. What you got here is STEP file, Solidworks part file, and 2D technical drawing. The height of this pen is 141.6mm and the diameter is 9.0mm. This pen design is a copycat from the pen in the market. It has an actual dimension of pen and suitable for study or making research and development. You may watch the tutorial on how it being model on the Copycat meowmeow Youtube channel.