The comb binder is a traditional and perfect machine for punching & binding documents, reports and presentations, with solid metal housing, non-slip feet, high-leverage arm can be used for long-lasting.This convenient binding machine can manually punch up to 22 sheets of paper at a time. It features an efficient, easy-to-use design that allows you to punch and bind paper in a continuous manner. Designed for variously use in a medium office environmentTips:Binding machine comes with oiled cutting blade for protecting the punch die away from rusting.To avoid staining on the important document, please use oiled removing paper (enclosed ) to punch first in order to clean up the blades.Holes quantity: 21/Holes size: 0.12x0.31in (3 x8mm)Free blades: 21Punching capacity: 22 sheets (80g/20lb) or 7mil pp coverBinding capacity: 400 sheets (80g/20lb)Item Weight: 22.9 LBShipping Weight: 26 LBStreamlined, easy-to-use design boosts productivityMetal binding machine ideal for Long-Lasting UseEnhanced accuracy edge guide from 3 mm to 7 mm for pinpoint punching. Adjustments can be made with ease.Punching Paper FixerHorizontal document loading ensures accurate punch alignmentCustomizable BindingDisengaging pins let you control how many holes to punch, it means you can punch holes and binding paper larger or smaller than letter size.