Abstract: A three-dimensional printing system including at least one positioning mechanism, and at least one end effector movably connected to the at least one positioning mechanism. The at least one end effector includes at least one mixing head configured to dispense a material, and at least one subtractive tool configured to subtract at least a portion of the material such that a desired design is achieved.

Abstract: A sharpener for a carpenter's pencil that creates a profile shape desired by carpenters rather than a conical point.

Abstract: A pencil sharpener includes a casing secured in a housing and having a groove for receiving a pencil to be sharpened and having a cutter blade for sharpening the pencil. A device has a slide slidably received in the housing and has an extension extended from a resilient arm and engaged into the groove of the casing for determining the engagement of the pencil into the groove of the casing and for controlling the sharpening operation of the pencil. The slide may be adjusted relative to the housing for adjusting the engagement of the extension into the casing.

Abstract: A cue tip shaper, scuffer, and gauge with a built-in edge trimmer. The device has a carbide lined depression and outwardly extending lugs, also carbide covered. Relative rotation between the device and a cue tip shapes the tip, scuffs it to accept chalk and trims any material extending beyond the circumference of the stick. A gauge for the tip is provided in an edge of the device.