Centering55/45 or better on the front. 60/40 or better on the back.
CornersPerfect corners with no signs of wear, nicks, or softening. The corners appear flawless under all forms of inspection and are as sharp as possible.
EdgesPerfect edges under normal inspection. Any tiny imperfections are barely visible under close magnification. Edges are sharp and clean.
SurfacePerfect surface under normal inspection. Any tiny imperfections are barely visible even under magnification.