VEVOR Binding Machine Comb Binding Machine 21 Holes With Binding Spines

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 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. Perfect for everyday use. High quality materials and excellent craftsmanship ensure long-lasting durability.