Invisible screw - wall hook

3D printed wall hook. This was originally designed on Inventor so I have included the original ipt files for modification. Parts are designed to have about 0.5mm tolerance between the sliding parts which is good for my Cetus 3D printer. I printed this part with eSun wood filament, the color and the finish really goes will with white color wall.

Parts are designed so no support are needed for the print setting.

Update:
I have been using the hook for a while and it totally came apart. I accidentally hung a bag full of stuff! The original print set up is not good (orienting the hook vertically). In this orientation, the shear plane coincide with the load direction. So, it's better to print it horizontally. I have uploaded a picture of this new print orientation (the last picture). This set up will need a print support.