Cimco Tools DRY Mine Set 212155: Pica dry marking graphite for marking, outlining, and labeling even in hard-to-reach places. Writes on almost all materials, even on dusty, rough, and oily surfaces. Can be wiped off wet on smooth surfaces. The mines are protected by a stainless steel tube and advanced by a pressure mechanism. The practical storage case also serves as a sharpener. Features a pencil with graphite mine B2 (all-purpose writer). Replacement mines for Cimco item number 21 2151, water-soluble 8-pack (2x red, 2x yellow, 4x graphite).