The Rotating Blade for Cameo 4 expands the possibilities and makes cutting fabrics and felts practical and accurate. This is made possible by a new cutting technology that makes the blade roll (turn) on the fabric or felt. You can cut a much wider range of specialty materials, including cotton fabrics, leather, felt, wool and more. Blade Material: Tungsten carbide; Adjustment Method: none; Blade Length Range: 1 mm; Compatibility: Exclusive Silhouette Cameo 4. The cutting blade is a consumable item and its durability depends on the intensity of use, the cutting configuration performed and the type of material used in the cut. Therefore, there is no way to measure the duration of each cutting blade, which varies from client to client. The guideline in case of wear is the purchase of a new blade for replacement.