This is an over-engineered footrest for the very economical ikea antilop highchair. The collar parts compress the printed fingers against the legs to the footrest securely. Infinitely adjustable, the central joiner part allows the footrest to expand horizontally. Designed to print on printers larger than a 200 mm. Designed to be removable for cleaning, channel to allow the locking pin to pass through easily.

I printed in ABS but any filament should work. Uses about 250g of filament.