Family-owned and -operated, Koopman Lumber is a traditional hardware store packed with everything from paint and hardware to pet, contractor, electrical and plumbing supplies, lumber, home and garden products and more. Visit the service desk to rent power tools and lawn and garden equipment or party tents, grills and even a cotton candy machine. Check out Koopman's website and order online and have your order delivered to the store to save shipping costs. The store carries Town of Grafton trash bags, which must be paid for in cash only.