Key Handle

Ergonomic handle for a few common key blank styles like Kwikset or Hillman. It could be useful for people who have problems gripping a key to turn it easily. It could also be useful if you live in an apartment with deadbolt lock on the inside and outside of the door. 

The model prints vertically in one piece and lets you simply slip your key into the slot as shown. It should print tight enough to firmly hold your key inside, but not so tight that it is hard to remove.