Window hook 10

https://www.youtube.com/watch?v=47XkND8yul4
New design features,
10mm hight for strength.
Thumb grip for quick release.
More catch.

Rounded corners for high speed printing.
Only two ends for high speed printing.
Rounded ends for high speed printing
2 shells,"to match width so no infill happens,for high speed print".
10% infill,but no infill happens anyway which stops any jittering, again for high speed printing.

Print shown is pla.
Files to download are.
STL
SKP "sk