Before choosing someone, be sure he can offer you high-quality services. The locksmith you hire needs: • To correctly use machines, equipment, tools, dangerous substances, transport equipment, and other means of production; • Not to take out of operation, modify, change, or arbitrarily remove their own security devices, especially machines, equipment, tools, technical installations, and buildings, and use these devices correctly. • To cooperate, as much as necessary, with the employer and designated persons to implement any measures and requirements ordered by labor and health inspectors to protect workers' health and safety.