As I grow more and more spiritual , I have started to question the use of locks ?
Our prized possessions should not be jewellery , iphones, laptops , clothes or other 'valuables' . They should be things like quality time spent with near and dear ones , altruistic acts - getting a child into school / volunteering for older folks etc and especially meditation - enjoying gurmat sangeet , studying SGGS etc.
Also unloading your material stuff is a key to happiness , the less we have the lighter we feel and clearer we think.