Founded in 1989, D.I. Roof Seamers has been providing quality roof seaming tools all over the United States and Canada! Learn more about what we offer, how to find it and the people that make it possible.D.I. Roof Seamers has been in business since 1989 and is recognized as the world's largest and preferred supplier for quality roof seamers and hand tools in the USA and Canada.  With award-winning quality programs and a massive inventory, D.I. provides tools directly to the panel manufacturer, builder, and contractor.  With a 14 acre campus, including a 64,000 sq. ft. main production facility located in Northeastern Mississippi, we proudly offer a full Research & Development Team, Quality Control Laboratory and a staff of over 80 trained and certified employees.  Aside from Roof Seamers, Developmental Industries Inc. is the largest Tool & Die Manufacturing facility in the region.  We offer services for everything from concept development to installation and testing at your facility.  In July 2012, D.I. Roof Seamers opened their first International Distribution & Service Center in Niagara Falls, Ontario. This Center allows faster shipping times and the servicing of customers in Central and Eastern Canada along with customers in the Northeastern United States.