the.com/deadbolts
a lock that doesn't trust the door hinge to do its job.
means a manual locking bolt with no spring action, so it can't be forced back by shoving or card-slipping like a spring latch can.
from from deadlock mechanisms in 19th-century safes and vault doors, deadbolts moved to home doors as burglary rates climbed and insurers started demanding them.
grade 1commercial-rated, survives 10 strikes of force
credit card trickonly works on spring latches, not deadbolts
throw length1 inch minimum to resist kick-ins