When using the correct key, the bolt enters the tumblers and unlocks the device. Typically, these are your older style locks, and require you to use the key to not only unlock it, but lock it as well.

Why it’s smart: Aside from letting you unlock and lock your door without using a key when you’re at home, most smart locks connect to the internet via your home Wi-Fi.

Master Lock's new Bluetooth-enabled smart padlocks aim to make forgotten combinations or lost keys a thing of the past. Paired with the Master Lock Vault app, the new line of locks improves ...

UPDATE: x04d sent in a video demo (DivX) (dead link) of how to open a lock in 2 sec. using a padlock shim. UPDATE: The linked video above has long been dead.

Master Lock's new padlock unlocks using your fingerprint, so you'll never lose those fiddly keys again. It can even be "jump-started" if the battery fails.

You don’t carry bolt-cutters with you? Dog & Bone’s LockSmart Keyless Bluetooth Padlock and Fortune Brands’ Master Lock Bluetooth Smart 4400 Padlock look very much like standard padlocks.

Well, it only makes sense ... they’ve come up with an electronic replacement for the door lock key, so why not the combination padlock, too? That’s what Master Lock has done, with its new ...

Master Lock's 4400D Indoor Bluetooth Padlock lets you pop it open with the touch of a button and provide guest access to anyone you want.