Circle-Square Spring Coil Fidget

This is a fun and satisfying fidget toy inspired by classic coil-spring toys, designed with a unique circle-square shape. The "Circle-Square Spring Coil Fidget" can be stretched, compressed, or flipped around to relieve stress or simply pass the time. It’s also a great print to demonstrate flexible 3D printing and tolerances. Features: Fully 3D printable in one piece (no supports required) Designed for smooth and consistent spring motion with alternating circular and square coils Works as a tactile fidget toy or a simple desktop decoration No supports or rafts needed Prints well with PLA, ABS, or PETG — for the best visual effect, silk filament is recommended Usage Tips: After printing, gently stretch the model to separate each coil If it doesn’t separate easily, it may be due to over-extrusion or insufficient cooling In that case, check and calibrate your printer settings related to extrusion and cooling Note on file naming: D = circle diameter (in mm), width, depth H = height (in mm)