This brass pencil and crayon sharpener with adjustable settings allows for three distinct levels of sharpness that range from very sharp to rather blunt. The knurl attached to the end of the sharpener can be heard and felt clicking into place when it is turned. Depending on the setting, the pencil is allowed to enter more or less deeply into the interior of the sharpener. The precisely set angle between the cone and the blade then produces the desired point. Developed by DUX in the early 1950s. Includes leather case with snap.