Cardinal Gates Door Guardian - Door Lock Security & Door Reinforcement for Inward Swinging Doors - Child Safety Locks for Doors - Antique Brass

Check out Cardinal Gates Door Guardian. Put them toward the top of the door. We have 3, one on each door to the outside. Cardinal Gates Door Guardian -... https://www.amazon.com/dp/B004RL1K16?ref=ppx_pop_mob_ap_share Also, Cardinal Gates is a top notch child safety company overall, we have their stair gate at the top of our stairs and it's really great (it's the third we've tried in the search for safety.)