I love my Draper Expert Socket set, but the catch broke ages ago and I finally got fed up enough to create a replacement. This doesn't look exactly the same as the original, but as I lost the broken bit years ago I have no idea what it looked like anyway and as a bonus the case can now stand up on either end! :-) I did copy the lower half of the original catch as that was still attached - although I used a chamfer rather than a fillet on the bottom for easier printing!

This doesn't need any supports when printing, you will need to drill out the whole to a loose 3mm to get the original metal pin in there. I used eSUN PLA+ and it seems really strong.

I've included the Solidworks file if anyone wants to tweak it or modify to use for other cases.

I'm too lazy to shrink my photos down to under 500k, so please see my make for more and higher quality photos.