Key Features : Integrated 4-Hole Punch, TECHNICAL SPECIFICATIONS: Operating Method: Manual Punch / Manual Bind Max Document Size: A4 Operating Width: 302 mm. Max Punch Capacity: 4 Sheets (80 GSM) Max Binding Capacity: 50 Sheets (80 GSM) + Front and Back Covers Punching Knives: 21 (Plastic Binding) / 4 (Hole Punch), Compatible Supplies: Plastic Binding Combs With 21 Rings, 6 to 12 mm Display Type: Cardboard Box With High Quality Graphics Packaging: Cardboard Box, 100% Recyclable. PE Bag.