South Penn Lock and Safe has been serving Delaware County, Philadelphia, and Chester County Since 1979. Dana the owner is the only Master Locksmith in Delco, and prides himself on guaranteed prices and quality of work-No Surprises Period. South Penn Lock and Safe will fix the transponder on you key if it is faulty, in addition to selling and serving your home or business safe. South Penn provide emergency service. You are welcomed to stop in our showroom located in Media Pennsylvania.