With both wire and comb punching dies, the Akiles DuoMac C31 3:1 Wire-O® & Plastic Comb Punch & Bind is a versatile & easy-to-use combo binder. This combination binding machine allows you to punch and bind both Double-O Wire in 3:1 Pitch and Plastic Comb in one single machine; without changing punching dies.

Features: 

• Heavy-duty 
• Multi-Functional 
• Reliable
• Easy to use  
• All dies can be independently disengaged, allows punching of any size document while preventing partial side-end perforation
• Side Margin Control provides an evenly centered punch for all document sizes
• Vertical Wire Closer
• Wire Holder holds wire in place for easier inserting of sheets
• Diameter Scale measures document thickness in order to select best wire/comb size option 
• Master Selector determines the correct Wire Diameter, Closing Position, Depth Margin & Wire Pitch
• Wire Closer Control has a continuous adjusting scale for an exact and secure closure every time
• Open Punching Throat & Continuous Punching Guide for an easy alignment & punching of longer documents
• Depth Margin Control provides the correct punch margin depth for each wire/comb size and reduces tearing of document