At Sam the Lock Guy we pride ourselves on being one of the most reliable and affordable locksmith service providers in Cambridge, MA. We offer a range of locksmith services that include break-in repairs, broken key extraction, emergency lockout services, installation of new locks and master key systems and so much more. With an expansive network of highly experienced and licensed locksmith professionals, we are able to serve customers all over the Cambridge, MA region. We deal in all commercial, residential and vehicle lock and key services and are amongst the oldest and most reliable locksmith companies out there.