the basic cable is a little larger but very much like the double cable design at the quilt stencil website.
what i truly love is the woven corner design, and i haven't seen anything like it in any plastic stencils.
the book is called "quilting designs of the amish" by pepper cory.
i have had that double bladed knife since the late 90's. i got it on sale at an art supply store on yonge street in toronto. curry's!
cheers
aileen