Wescor is a general contractor operating out of Boston, MA and employs, carpenters, painters, and laborers. Specializing in lab / office renovations. Cornerstone Millwork is a millwork supply company in Woburn, MA. In addition to providing millwork needs to Wescor, we work with local commercial contractors and residential customers. Our work varies; labs, kitchens, wine rooms, furniture, overall general millwork needs.