No. 1 Edge
(Square)
Broken Radial Corners
No. 1 Edge
(Round)
Radius approximately equal to 1/2 thickness
No. 2 Edge
Natural mill edge
No. 3 Edge
(Slit)
Approximately square
No. 4 Edge
(Round)
Rounded corners - may be flat with slitting fracture visible across the edge
No. 5 Edge
(Approximately square)
No. 3 edge de-burred
No. 6 Edge
(Square)
Radial Corners - may have slitting fracture visible across the edge