Check the listing for details. [New]Binding Machine, Comb Binding Machine 21-Holes Binding 450 Sheets, Book Bin. Condition: New. Listed at 52.70 USD. 【Description】●Binding Efficiency and Neatness: Our binding machine handles bulk projects effortlessly, punching up to 21 holes, 12 sheets, and binding 450 sheets at once. Ideal for schools, offices, and businesses, it ensures professionally finished documents. ●Compatible with Various Sizes: This comb binding machine is suitable for Letter size, A4 size, A5 size, and more, ensuring strong compatibility for various document bindings. ●Easy to Operate: Designed for user convenience, our comb punch binder features adjustable edge guides and side margins, and expandable comb binding from 3/8'' to 2''. Simply press the handle lever upward to punch and downward to bind, making operation easy and effortless! ●Sturdy & Durable Material: Crafted .