Manual Comb and Round Coil Punch with Built-In Electric Coil Inserter and Comb Opener Manual Round Hole Coil and Comb Punch Built-in Electric Coil Inserter and Comp Opener 20 sheets single punching capacity (20 lbs paper) 14" width punching capacity with open sides for even wider documents All dies can be independently disengaged, to allow the punching of any size document while preventing partial side-end perforation. Closing capacity: From 3/16" to 1-1/4" All metal construction 1 Year WarrantyAkiles