Licensed - Bonded - Insured Member of Associated Locksmith's of America Serving St. Mary's County, Calvert County, Charles County and Patuxent River Naval Air Station Owner Donald Jones Registered Locksmith Welcome to D&L Locksmithing. We have over 35 years of locksmith and security experience and have been serving Southern Maryland and Patuxent River for nearly 20 years. We pride ourselves in providing quality products for your home or business. For your automotive needs, we have the latest equipment for most computer chip key replacement and duplication capabilities. We have a fully stocked mobile unit. We come to you. Our van has key machines, lock hardware for interior and exterior doors for both residential and commercial buildings, door closures, mag plates, automotive lock out tools (and we actually know how to use them without damaging your vehicle), equipment to open that safe combination that you have forgotten or is no longer working and thousands of key blanks.