The "Pivot Pencil" is a writing instrument: carpenters pencil, mechanical pencil, pen, marking pen, etc; A Pivot Swivel Joint inserted into the center of the Wooden Outer Casing that "allows the tool to pivot in various angles", which allows the pencil access in tight spots and around corners. If you can't reach the surface you wish to mark, you might as well guess. But the "Pivot Pencil" can take away all the guesswork. The unique pivoting design is all the accuracy you need.