The Ars Tech A4 39 Holes Spiral Binder Machine (White/Green) is a manual binding tool designed for A4-sized sheets (8.5x11 inches). It features a robust metal body with high-quality steel cutters and can punch up to 15 sheets at a time through 39 holes. The machine has a solid base for stability and is commonly used in press and book publishing sectors for efficient spiral binding. Its dimensions are approximately 41 x 32 x 17 cm, making it a compact and durable solution for professional and office binding needs.