The S20 features a punching capacity of up to 20 sheets (20# paper) at once, made easier by a full handle that allows for left-handed, right-handed, or two-handed operation! Its lightweight design allows it to be carried around the workspace, making it an excellent addition to any school or small office environment. This binding machine uses 3:1 pitch double-loop wire binding spines and binds documents up to 1/2 inch thick (with 9/16 inch diameter spines). Item model number: S20 Number of items: 1 Manual Punching and Binding Operations (3:1 pitch) Full set of disengagement dies Punching capacity: 20 sheets (No. 20 paper) Max. sheet size: A4