Apply to surfaces: any surface or texture can be marked with this mechanical pencil set, such as oily, rough, , wet, icy, or rusted surfaces, suitable for construction, automobile, bowl, metal, plastic, glass, wood and paper and so on. Small assistant: The assistant 2 mm mechanical pencils can bring to . It contains multiple colors to according to your daily requirements. Size: Pencil refill: . 2.0 mm Length of pencils: . 15 cm/ 5.91 inches Length of pencil refills: . 12.5 cm/ 4.92 inches color:As shown :Metal Package Contents: 12 x Mechanical Pencils (including black and blue, 6 of each color) 9 boxes x engineering refills (including 3 boxes silver, 2 boxes black, 2 boxes red, 2 boxes yellow) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.