This Pen Holder has been designed to convert your Silhouette Cameo 4 into a sketching and drawing machine. This Pen Holder features 3 threaded adapters that allow you to use a range of pens, from a thinner standard ball-point pen to a thicker felt-tip marker to create a variety of personalised designs.Features & Benefits Includes 1 Pen Holder Features 3 adapters for varying pen sizes For use with the Silhouette Cameo 4 Specification Pen Diameter Range: 0.25 inch 0.4 inch