Have you ever had a problem with where to attach a string or ribbon to tie down the boot lid when loading something too long?
This thing solves your problem!
Fits most cars, locks into the existing lock and is removed by opening with the usual "handle" to the boot lid.
If it does not fit in the lock of your car, print it in 90% size and it will probably fit.
W A R N I N G
This thing is not for securing your cargo, only for holding down the boot lid
Any material should be ok.