Unlock the creative potential of your CNC machine with this Pen Drawing Attachment chucked into a 1/4'' collet. The attachment features adjustable pen pressure, allowing it to accept ball-point pens, felt-tip markers and other drawing and writing implements (not included). Springs absorb any irregularities in the surface, and help protect the writing tip. Fantastic for creative artwork, as well as practical applications like layout, checking tool path accuracy and labeling parts. Made from commercial-grade aluminum, with precision-ground 1/4'' shank and accurate center-line alignment.