hollow tube steel lock filled with a pressurised die like used in banks, maybe smelly too. thus lowers weight and makes a thief a lot more obvious maybe pass a current threw the lock so circuit is broken alarm sounds. unless you study composites your not gonna make a better lock through strength
hollow tube steel lock filled with a pressurised die like used in banks, maybe smelly too. thus lowers weight and makes a thief a lot more obvious maybe pass a current threw the lock so circuit is broken alarm sounds. unless you study composites your not gonna make a better lock through strength