Binding Efficiency and Neatness: Our binding machine handles bulk projects effortlessly, punching up to 46 holes, 20 sheets, and binding 500 sheets at once. Ideal for schools, offices, and businesses, it ensures professionally finished documents.

Compatible with Various Sizes: Featuring 46 detachable pins, this upgraded coil spiral binding machine allows you to insert large and non-standard page sizes. It's compatible with Letter size (42 holes), A4 size (46 holes), A5 size (33 holes), and more, ensuring versatility for various document bindings.

Easy to Operate: Designed for user convenience, our coil binding machine features adjustable edge guides and side margins, and adjustable coil binding spine sizes from 1/4" to 2". Using this electric coil binder saves time and energy compared to manual methods.

Sturdy & Durable Material: Crafted with a cast iron base with a powder-coated surface, our book binder is robust and rust-resistant. The ABS plastic shell is wear-resistant and not easily cracked. Metal side arms and carbon steel blades ensure durability and precise punching.

Abundant Accessories, Great Value: Our punch binder comes with 100 pcs of 5/16'' coil spines, 1 wire cutting plier, and 1 oil-absorbing paper. No need for separate purchases! Use the oil-absorbing paper to clean the machine before the first use to avoid paper soiling, as it is lubricated.