Security Lock Service In Business Since 1960 Security Lock Service offers comprehensive solutions for all your locking and unlocking needs. At Security Lock Service they are driven by their commitment to maintaining the best standards of services. We are the oldest and affordable locksmith service provider in OKC, the best Locksmith OKC. Contact us today for all kinds of locksmith services we specialize in lost car keys, re-keys, car keys extraction and such other services. Call us today!