Messenger Molding - Plastic Injection Molding Company Messenger specializes in high-tech, tight tolerance, precision mold design. As a full-service molder, we take pride in building relationships with our customers so your product is designed and built e Messenger specializes in high-tech, tight tolerance, precision mold design. As a full-service molder, we take pride in building relationships with our customers so your product is designed and built exactly to your specifications. Our team works with you one-on-one to be sure you are satisfied.