Buckle for Seba FR1 roller skate

I tried to print this with ABS, ABS+, PETG, and Flex. Now using the one made of ABS+, but this is not an ideal material for that: it isn't flexible enough especially at low temperatures, and thus too breakable. Even worse with ABS and PETG. Flex is too flexible. I haven't found an ideal material yet, but ABS+ is usable. If you discover it, please comment!

**UPDATE:** It seems that I've found a suitable material - ABS+FLEX (by plexiwire) with 100% infill. Added shorter model as well.

SolidW