Flat Benches- Benches are a must have for any park. Flat Benches make wonderful park furnishings and have many uses for park or school playgrounds. A flat bench can also be a wonderful addition to a business, bus stop or outdoor area. Flat benches are a perfect choice for player seating in baseball dugouts and other park or school sports fields. Commercial park benches are made of durable wood, metal or plastic that is built to last.