A working key for the handcuffs used by Dutch and German police. Tested, works perfectly. This is a re-do of Ray's key, but I've used a real key as reference, so it's now much more accurate. Be careful about print quality. Make sure the key is as sturdy as you can make it, because you don't want it breaking off inside a handcuff.Again: it's important that you print this as sturdy as possible, to prevent it breaking off inside a handcuff. Print it lying down. Use support material. Make it as solid as you can. You can even play around with your slicer's fudge setting to make it more densely packed (in Cura this means lowering the packing density, in other slicers try the filament diameter). Using small layer heights (e.g. 0.1mm) also helps to make it more sturdy. So, to recap: