Door Man Manufacturing

Granite City, based in Livonia and Ann Arbor, MI, specializes in providing an exquisite selection of natural stone, including granite, quartzite, and marble, as well as engineered quartz and porcelain products. With a commitment to quality and craftsmanship, they serve both residential and commercial clients, helping transform spaces into stunning masterpieces that reflect unique styles. The company boasts an extensive portfolio of materials, covering 15,000 square feet, along with a variety of sinks for kitchen and bath applications. Granite City prides itself on delivering exceptional service, ensuring that each project meets the highest standards of quality and elegance. Generated from the website

Established in 1972, PTM is an ISO 9001-certified company that develops solutions for prototype needs of its customers. It is a specialist in prototype stampings of clips, clamps, fasteners and brackets of various types. The company provides in-house stamping and fourslide production services and serves a variety of companies in clip, fastener and bracket markets. It offers a wide range of services, including product development, laser cutting, electronic document management, assembly and production stampings. In addition, the company has a more than 20,000-square-foot prototype facility that houses presses and two- and three-axis lasers. The company is located in Fair Haven, Mich.

Established in 1916, Van Horn Concrete is a locally owned and operated company that delivers ready-mix concrete and materials. It serves customers in Oakland, Macomb and Genesee counties in Michigan. The company features a fleet of trucks that supplies materials for the construction of driveways, patios, footings, walls and commercial buildings. Van Horn Concrete is a member of the National Ready Mix Concrete Association.