https://www.openlearning.com/u..../stefansenberntsen-s
https://serrano-siegel.federat....edjournals.com/are-y
Using Hook Locks to Secure the Contents of Your Van Hook locks are a great method to increase the security of your van. They're simple to install, and they work independently from your van's main lock. Gunnebo Industries, now Crosby has developed the self-locking swivel hook in order to improve safety at construction sites. These hooks snap shut when under load and stop falling or grabbing onto overhead