The Silhouette 3mm Kraft Blade for Cameo 4 is available exclusively for the Silhouette Cameo 4. The 3mm Kraft Blade for the Cameo 4 allows you to cut specialty craft materials, such as acetate, craft foam, and leather. The 3 mm depth is designed specifically to take advantage of the increased clearance the Cameo 4 has to cut even thicker materials. The Strong Tack Cutting Mat may be recommended for use with some materials when using the 3mm Kraft Blade for Cameo 4.