Marks-A-Lot  Jumbo Chisel Tip Permanent Marker, Black, 1 Pen (24138) Jumbo 2/3" chisel tip marks in a variety of line widths Generous ink supply lasts a long time Marks virtually any surface, including cardboard, metal and plastic Dries quickly and is rub-resistant to minimize smudging Nontoxic, low-odor formula is safe for both children and adults