Hiboom Solid Carpenter Pencil Set for Construction with 7 Refills Built-in Sharpener, Long Nosed Deep Hole Mechanical Pencil Marker for Carpenter Scriber Woodworking Architect, Design Patent (Green)

Two colors refills They come in a box.

Use yellow pencils for dark surfaces and gray pencils for light surfaces.

Built-in sharpener It is screwed into the top of the pencil, which won't easily get lost.

More thoughtful details The anti-skid handle is labor-saving.

The pen clip can be easily attached to the pocket, which is not easy to lose.