I'm not quite sure what you're after here - most insurance companies insist on some form of security, but you'll need to check your policy. If it's information on these particular items, then I've had a Saracen hitchlock for 4 years and it worked OK until last year when the tubular lock started to be difficult to operate and I had to replace the lock at a cost of £20. Purpleline were not particularly sympathetic to my complaint about the lack of longevity for their locks, but it was cheaper to replace the lock than buy a different hitchlock.
John M