3-Pack Silhouette Replacement Blades This Silhouette Replacement Blade 3-Pack is designed for use in all Silhouette electronic cutting tools, including all models of the Cameo, Portrait an SD. Replacement blades can be used to cut a variety of materials from fabric to vinyl.Ratchet-style blade Make your blades last longer by using one for fabrics, one for vinyl, and one for paper. These black ratchet blades are easily adjustable from a length of 1 to 10mm.