It also has a 9 gauge border wire for strong edge support. (healthychild.com)
Its sharp lines and strong edges provide a very muscular look and it handles with the same stature. (loebermotors.com)
In the 1930s he used tape to give strong edges to forms, also reworking and overpainting sections, as seen in his work Gridiron (1943 — 1944). (en.wikipedia.org)