P&N Quickbit Nibbler Attachment

Brought one of these a year or so ago, during this time, three cutters just snapped, luckily replaced under warranty, but now well outside warranty, another snapped cutting corrugated roofing, not stainless steel either I had a friend who brought a cheap one off Ebay and with two cutters, one cutter went blunt within a year, but they sent two anyway, after a year plus starting going blunt so just brought replacement cutters.

When I sent complaint to P&N no reply, not interested at all and that's after sending photo of snapped cutter and how the black covers just come loose.

For the money, not worth it, better off buying cheap ones and you can get four for same price as one P&N which I notice Bunnings stopped selling, wonder why?