about this project Package Contents4 boxes of Carpenter mechanical pencil refills including 6pcs red + 6pcs yellow crayon refills + 12pcs gray HB graphite refills (refills only). Sufficient quantity will meet your marking, drawing and carpentry needs. 3 Colors Replacement RefillsThree colors can mark different meanings. Drawing on dark surfaces is no longer a problem. You can choose according to the color of the surface where you draw, making your sketches more readable. High Quality MaterialThese woodworking pencil leads are made of high quality wax and HB graphite. It is durable, strong and durable, with double layer sticker protection while writing, it will not break easily. Thoughtful DesignThe diameter of the refill is 2.8mm and the length is 12cm. They are suitable for long distance deep holes. The pencil can reach into deep places or narrow holes for easy marking and drawing, giving you a comfortable writing experience while woodworking. WIDE APPLICATIONThese mechanical pencil leads with deep holes can easily mark the surface of wood, metal, plastic, paper and other materials, which can significantly improve work efficiency. Marks and writes on all surfaces including dusty, rough, oily wet and dark surfaces.