The 3mm Kraft Blade for the Cameo 4 allows you to cut specialty craft materials, such as chipboard, acetate, leather, and craft foam. The 3mm depth is designed specifically to take advantage of the increased clearance the Cameo 4 has to cut even thicker materials. Details:0.1mm - 3mm blade length range6 bladesStainless steelFor use with the Silhouette Cameo 4 machine (sold separately)