Slab of aluminium milled to a flat triangular-ish shape about 10mm thick, then inside hollowed out to half depth and 8 counter-sunk holes non-tapped. Common issues: - item is not flat - nicks and dents on the edges - non uniform depth of the counter-sunk holes - holes in incorrect locations - unapproved changes to design - scratches - pores (poor material quality) - incomplete milling

Then parts have to be hard anodised and sand blasted.

- Sand blasting uneven - Sharp edges remaining - Streaks - Contamination - Exposed bare metal (it is only acceptable in the holes that could be used for hanging)

Companies also have virtually non existent QA. You can list them things that will cause rejection and they send it anyway.

One company told him after sending a batch that was complete carnage "We can give you $100 coupon for next order!" he insisted on rework. So they sent again, even worse.