This Uni Chalk Marker with Chisel Tip is a fun, creative way to make temporary designs and signs. The marker pen produces a chalk like effect, perfect for drawing on non-porous surfaces like windows, mirrors, glass and metal. The pen washes off easily with a damp cloth for simple removal. Chisel tip allows you to draw lines 8mm thick. Great for use on shop fronts, message boards, and for fun at home. Chalk marker for fun, creative designs & messages. Designed for use on non-porous surfaces. Can be used on windows, mirrors, and glass. Removes easily using a damp cloth. Chisel tip produces 8mm thick lines in Gold.