Product review (5 stars): just what we needed.
We have a mobile food business and use these to secure the refrigerator and freezer doors during transport.  The only issue I encountered was I did not clean the mounting surface good enough to bond sufficiently.  We use large trigger dog lead hooks for dog chains because there is no slack,  We tried small carabiners used for key chains but they turned sideways and allowed the doors to open, the sudden jolt would break the carabiner and the door would open.