Dear Sarinya,
We have faced the problem that the product is easily broken when punch 12.8 x 8.5.
The main reason is when punch 12.8 x 8.5, the material will be pushed into the follow place and make the arrow place easily break.
The tooling maker suggests probably you can do the 2nd operation after forming 27.0 x 14.5.
Please advise your comments.