Binding Machines From Tianse, 21-Holes, 450 Sheets, Comb Bind Machine Book Maker ?Easy to Use: Punch Bind?: Just Punch and Bind, two simple steps. Manually punches up to 15 sheets of paper at a time and binds up to 450 sheets with 2?? comb spines, allows you to create professional-looking bound books at home or in the office quickly and easily; ?Professional Customizable Binding?: Professional comb binding machine specially designed for all major sheet sizes including Letter Size (with Letter Size mark on the baseboard for accurate punch alignment); Open-throat design allows you to insert large and non-standard page sizes to meet the specifications of your unique project; ?Advanced Sharp Cutting Blades?: Advanced carbide cutting blades ensure accurate cutting power, allowing you to punch holes in up to 15 sheets of 80g(paper thickness?20lb) paper at a time without any misaligned holes or loose pages with burrs, greatly saves your time and energy; ?Humanized Design Detailed Craftsmanship?: Dual functional handle to punch and bind easily, saves both time and energy, allowing you to manually punch holes in your documents either left- or right-handed; Solid metal construction for long-lasting use; Non-slip feet design on the bottom, waste drawer for keeping paper scraps, and integrated document measurement device for added convenience and quick set-up; ?Great Value For Money Lifetime Warranty?: The binding machine comes with starter kit 100pcs of 3/8?? 21-ring black plastic comb spines. (To keep the machine sustainable, we apply lubricant to the machine, please use the included oil-absorbing paper to bind it before you start using it)