Features Widely Compatible: This handheld spiral binder is suitable for binding A4, B5, A5, A7, B4 paper, and various porous number loose leaf, making it a versatile tool for home, school, and office use. Efficient Punching: Capable of punching up to 10 sheets of paper (70g) with a 5.5mm diameter and 9.5mm hole spacing, providing quick and easy binding for small projects. Customizable Binding: The attached scale line and ruler board allow for precise positioning, enabling users to customize the number of holes and DIY punch A4, A5, and B5 paper as needed. Accurate Positioning: Equipped with positioning posts and rulers on both sides, ensuring precise hole punching and easy determination of punching position. Durable Design: Featuring an all-metal lacquered body for rugged durability, the non-slip paper spiral binder includes a clamshell plastic tray to collect paper scraps and protect tabletops. Specification: Item Type: Paper Binding Machine Color: Light blue Hole Distance: Approx. 9.5mm / 0.37in Hole Dimater: Approx. 5.5mm / 0.22in Feeding Depth: Approx. 7mm / 0.28in Application: A4, B5, A5, A7, A6 etc. (thickness not more than 10 sheets(70g)) Package List: 1 x Host 2 x Accessories Package List 1 x Host 2 x Accessories