Protect your Nutella from your kids ;-)
Fits for 750 g Jars from Germany (Cap Size 85 x 21 mm)
Fits locks with 5 or less millimeter shackle bar
Print part 1&2, the splint is optional if you won't use a screw and a nut.
Attach parts with a M4x35 screw and a lock nut
Optionally print the splint (for more stability print it horizontal), put it the hinge and use a soldering iron to spread and lock the splint (i hope you understand what i mean ;-)