Safer and better cart clips
July 2013 R&D Labs

This modification is safer too since an open hook won’t come snapping back at you if it accidentally released. That’s because these clips have a spring-loaded arm that closes across the open gate.
The inspiration was the fact that the stock hooks would snag on just about everything in the vicinity including cables, the undercarriage, and shoe laces before you could stretch it around your gear and clip it near the top of the cart. Sometimes the hooks wouldn’t stay secured dangerously snapping loose and releasing the cargo. Stories of a flying hook gouging out someone’s cheek were horrifying and this was not to happen to anyone.
Any operation that uses these model of carts should seriously consider making this modification. It is primarily a safety issue but it also makes using such a cart a lot less of a nuisance.