Our Precision Made CNC Pen holder will transform your cnc into a plotting drawing machine, great for layout, checking tool path accuracy, plotting artwork, labeling parts, made from commercial grade Delrin, with precision ground 1/4″ shank, it fits in your router like a regular bit, it also features adjustable, pen pressure, and accurate center-line alignment, fits pens, pencils, up to 1/2″ in diameter even large markers, A must have tool for anyone that uses a CNC, it’s even used by the Smithsonian Institution, to create some of their display exhibits.