Functional Padlock with Key Print-In-Place.

I've printed the padlock and key with 0.16 mm layer height, 2 perimeters and 15% lightning infill. For a stronger lock use more perimeters or more infill. After printing built-in support in the keayhole needs to be removed, this is easily done using a pair of pliers, additional built-in support is released by tugging on the shackle of the lock. Do not use slicer generated support when printing.