Characteristic: 1.Simple and accurate 2.Ideal for schools,copy centers,quick printer,etc. FEATURES:Quality hollow punch bit designHandles 4mm and 6mm punch bits5 Preset punching patternsPunch up to 30mmTECHNICAL SPECIFICATONS: Number of spindles1Pre-set punching patterns5 patterns (20mm,40mm,60mm,80mm,108mm)Punching capacityUp to 30mmPaper margin adjustment6-20 mmPunch bit diameters4mm and ...