Mequon Diligent Locksmith proudly serves Mequon, WI and surrounding areas. We are pleased to provide residential, commercial and automotive locksmith services. Our expert technicians are licensed and insured, and we can provide you with installation, repair and replacement services you can rely on. The top priority for many people is security. Everyone wants to feel safe and secure when they are in their home or business. You also want to make sure that your car is properly protected.