Binding Machine 21-Hole Comb Punch Binder Machine for Letter Size / A4 / A5 Paper Easy to Punch Handle Adjustable Margin

• 【Precise Punch Alignment】Equipped with a positioning knob and adjustable edge guide, our book binder ensures accurate alignment for Letter, A4, and A5 sizes. • 【21-hole binding machine, reliable quality】Our comb binding machine is made for long-term use, providing consistent performance and professional-quality binding documents. • 【Efficient Operation】: Crafted with a solid metal housing, non-slip feet, and a high-leverage arm for punching, the entire process requires minimal effort. Align your pages, press the punch lever, and effortlessly insert the comb for binding. • 【3mm Fixed Paper Margin】 The built-in drawer-type waste compartment allows for easy disposal of paper scraps. Please ensure regular cleaning of paper scraps to prevent potential damage to the comb binding machine. • 【21-hole binding set】Our binding sets are specially designed to fit letter-sized papers. They are perfect for use in school, office, or home, and are great gifts for teachers, students, and colleagues. • Punching capacity/time: 8 sheets (a4 80gsm)，binding capacity/time: 350 sheets (a4)/φ30mm，hole margin: 3mm (not adjustable)，hole spacing: 14.3mm • Number of holes: 21 holes，hole size: 3x8mm，paper width: Less than a4 paper，product size: 38*21*22.5cm，product weight: 1.6kg