Keystone Concrete Block and Supply Company, Inc. was founded 1926 in Scranton,Pennsylvania by Joseph Galdieri. Today the company is owned and operated by the third generation of the founding family. The company has three manufacturing locations: Scranton, PA , Honesdale, PA and Towanda PA distributing to Pennsylvania, New Jersey, Connecticut, and New York  including Long Island. In addition to general construction building blocks, the company is the exclusive manufacturer of Versa-Lok retaining walls systems for eastern Pennsylvania. The company also sells a complete line of masonry supplies, manufactured stone veneers, concrete pavers and masonry accessories.