Convert your Silhouette machine into a sketching/drawing tool with Sketch Pens. Use sketch pens to draw elaborate designs onto various material surfaces or to add a hand-drawn look to your projects. This Ultimate Sketch Pen Set is a great way to jump into the world of sketching with your Silhouette tool. It includes all sketch pen colors offered from Silhouette so you can get a sample of everything! No tool adapter is required if you are using the Sketch Pens in the Silhouette Cameo® 3 and any of its previous models, the Silhouette Portrait® 2 and its previous model, and the Silhouette Curio®. A tool adapter is required if you are using the Sketch Pens in the Silhouette Cameo® 4. (Only the Sketch Pens with the black bodies are compatible with the Cameo 4 tool adapter.) For use with: Silhouette Portrait®, Portrait® 2, Portrait® 3, Cameo® (original), Cameo® 2, Cameo® 3, Cameo® 4 (with tool adapter), and Curio™. Details: Includes assorted colors Rollerball pen tip type 0.5 mm fine width tip size Compatible with and array of Silhouette® machines Contents: 24 sketch pens in basic, glitter, metallic, neon, and natural colors Exclusive download card for 10 pre-selected sketch designs