Our binder clips are made of tempered steel, strong to use, Assembled with steel arms, the clips provide an extra strong grip for your documents. Specifications: -No rust on papers - 36 pieces, black metal iron - 3" (75mm) width, 1.5"Capacity - Binder clips and package are both reusable - Strong metal clamps with an opaque black finish - Keeps files bound together, prevents papers from slipping or pulling out - Tempered steel construction provides extra strong hold - Perfect for office, school, classroom and home, such as teachers or clerks bind document, students organize test paper, as well as unfinished food packaging, photos, cable clips and drawing board clips, and outdoor essentials. User: Everybody. Application: Hotels, Office, Schools, Restaurants, Stores and crafts.