The Cameo 4 Tool Adapter Set provides 4 adapters that allow you to use Silhouette tools from previous machine models with the Silhouette Cameo® 4. The compatible tools you can use with the adapters are the Standard Blade the Premium Blade the Fabric Blade the Deep-Cut Blade the 2mm Kraft Blade and the Silhouette Sketch Pens (only the Sketch Pens with the black bodies are compatible with the Cameo 4 tool adapter). These adapters can be reused. Blue - Sketch Pens & 3rd Party Tools Gray - Deep Cut Blade & Premium Blade Black - Ratchet Blade & Fabric Blade White - Kraft Blade