I blew it up but don't see much. Are the corners of the box crushed in the area of the break? I've been told UPS uses a conveyer belt to sort packages. Golf club boxes get sideways and pinned on both ends while the conveyer keeps pushing, bending them in half. Nothing with packing would help that. If it snaps steel, it will snap just about anything.
Here's the pic if you can see anything.
f47c_1.jpg