Replacement hook for IKEA Octopus. The original hook fails over time as the moving parts are connected by a thin flexible flange. This design has a hinge that will perform better than the original. With holes in two hinge parts designed for a piece of 1.75 mm filament or steel wire to hold them in place. The hole in the upper part can be connected to the existing spring on the Octopus. The sizes worked for me, but you may need to smooth out the prints depending on your print quality and/or filament.