25x1.40mm Zinc Plated Panel Pins

I haven't used any of these yet , so can't pass comment But if they're regular Challenge quality that I've come to know then I'll be satisfied.
I'm bemused at being asked about panel pin quality for the first time in 47 years of joinery! and was going to be quite flippant! ,then I remembered that I searched for Challenge after persevering with several sizes of sheradised panel pins that I'd been supplied ,but which are far too soft and annoyingly bend much too easily. So expecting these not to be soft . I'll only use then internally(s/steel outside) as the zinc plating soon breaks down around moisture.