The ISM AC100T air powered box stapler drives5/8" leg 1-3/8" crown A series carton staples. Includes one year manufacturers warranty. This industrial grade stapler is excellent for high and low volume carton closing projects. Specific applications include folding boxes, complete overlap, and more. Box staplers from ISM are manufactured to the highest quality standards. They feature a lightweight, well balanced, efficient, and extremely durable design.