Cretacolour 5mm Artist Leads can be used with any 5mm clutch pencil, or you can just hold them in your hand for drawing, sketching or shading. The 120mm-long leads are the very best artist-quality and you will find them an incredibly versatile tool - once you start using them you will wonder how you ever managed without. The Cretacolour 5mm Artist Leads siz leads.