1Set Contents: Our carpenter pencil set has two 0mm carpenter pencils and two 8mm deep hole carpenter pencils, six black 8mm pencil refills, six yellow 8mm pencil refills, twelve black 0mm pencil refills, twelve red 0mm pencil refills, and four storage boxes. 2Deep Hole Carpenter Pencil: The deep hole carpenter pencil has a curler at the top and is extended by 45mm for marking through holes or other narrow areas. 3Clamp Design: Both the 0mm carpenter pencil and the 8mm deep hole carpenter pencil come with a clamp so you can easily attach them to your clothes for easy carrying. 4Applicable Scene: Our carpenter pencils can be used in fields such as construction and automotive for drawing on metal, plastic, glass, wood and paper. 5A Variety of Materials: The carpenter pencil set is made of ABS, metal, graphite and wax materials with excellent craftsmanship, so you can achieve long term use.