Give your used 45mm rotary blades extended life by placing them into this BladeSaver Thread Cutter! This unique tool allows you to transform old rotary blades into a convenient thread cutter! Each BladeSaver comes with a magnetic case to keep your thread cutter safe when not in use or when taking it to class. This product is also versatile! The BladeSaver case doubles as the blade stand to hold your thread cutter securely in place during use.