The OX Tuff Carbon Marking Pencil Value Pack is great value for your money! This set contains the OX Tuff Carbon Marking Pencil, a tough marking pencil with an automatic lead feed that can write on almost any surface and 4 lead replacements. FEATURES Writes on almost any Surface including but not limited to: wood, glass, steel, damp wood, rubber, plastic and stone Ideal for deep hole marking and general-purpose construction marking. Stainless steel lead feed tube - Diameter Of lead 2.8 mm Made From High Quality PP/ABS/Stainless Steel Materials Includes black, red, white and yellow refills. TUFF CARBON - GRAPHITE LEAD (10PK) The OX Tuff Carbon ' Graphite Lead Replacement (10pack) features durable 2.8mm diameter carbon lead replacements which can mark all surfaces, wet or dry. FEATURES Writes on almost any Surface including but not limited to: wood, glass, steel, damp wood, rubber, plastic and stone Ideal for deep hole marking and general-purpose construction marking. Stainless steel lead feed tube - Diameter Of lead 2.8 mm Made From High Quality PP/ABS/Stainless Steel Materials Handy belt Clip for attaching to belt or trousers