Lock and Key was a post-hardcore band hailing from Boston. Their sound is akin to bands like Hot Water Music, Avail, Small Brown Bike, Fuel, Fugazi and the like. They have a full-length album and an ep on Deep Elm Records. Lock and Key is:
Mike Vera (guitar, vocals)
Josh Hoey (bass)
Keith Casella (drums)
Ryan Shanahan (vocals, guitar)

Read more about Lock And Key on Last.fm.