Features:- Hangable metal case containing a wide range of finely graded consistent Mars Lumograph and Mars Lumograph black degrees Mars Lumograph: Special lead formulation for results with a metallic lustre in a wide variety of grey tones Mars Lumograph black: Special lead formulation containing a high proportion of carbon for matt, jet black results Premium quality drawing and artists pencils Lines reproduce well Unbelievably break-resistent through special lead formulation and superbondedlead Wood from PEFC-certified, sustainably managed forests