Shelf standard increments...

So I finally got my order from Outwater Hardware, no thanks to f'UPS pathetic delivery.
Among the items I ordered were the SUP-5030-Q-CL "lock down" shelf clips for 1/4" holes. Now these shelf clips have a double pin arrangement which is nice, but the spacing is weird.
Since these are for 1/4" pin holes I would expect them to be for 1" hole spacing, but they're not. They don't seem to be metric spacing either. I measure 32.5mm or 1.28" hole spacing which seems just bizarre.
Fortunately it doesn't really make any difference in this case since I can drill the pin holes at any spacing. Has anyone run across this type of issue before?
Pete C.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.