The Mobius & Ruppert Brass Round Double Hole Sharpener features two pencil diameters, making this an ideal sketch box staple. The smaller hole measures 7.8mm for standard pencil diameters and for-point tapering. The larger hole measures 11mm and is perfect for sharpening charcoal, pastels, and colored pencils.
Mobius + Ruppert sharpeners are the highest quality from the well known German specialist. They are considered the finest in the world.