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A physical access control system replaces keys with credentials and electronic locks. Here is how an access control system works, part by part.

A transponder key is a car key with a chip that answers your immobilizer. Learn what the transponder chip in a car key does and how to spot one.

A jamming lock usually comes down to a misaligned strike plate, grit in the cylinder, corrosion, or a worn key. Here is how to tell which one you have.

Step by step method for installing a deadbolt lock in a metal, steel clad, or hollow metal door, including bit selection, drill speed, and strike plate alignment.

A jammed door lock means a bound latch or a seized cylinder. How to open a jammed door lock from the outside, and how to fix a lock that sticks.

A panic bar on a door lets people exit fast in an emergency. How panic bars on doors work, which types fit which doors, code triggers, and installed cost.

Push start key fob programming almost never works at home. See what VW push button start, Hyundai, Kia and Nissan systems actually require.

Locked out? Here is what to do when locked out of your house, how to get back in, who to call, and what a lockout actually costs.

Changing a lock on a business door takes 30 to 60 minutes when the existing door prep matches the new hardware. You measure, take out the old lockset, fit the new one, then adjust the strike until the latch catches clean. Knowing how to change a commercial door lock is realistic for cylindrical locksets on…

If you need to know how to remove a broken key in a door lock, start with the visible stub. Grip it with needle nose pliers and pull straight out with steady pressure. If nothing sticks out past the face of the cylinder, use a broken key extractor or a thin jigsaw blade to hook…