This is a high quality (if not pricey stapler). I needed a more powerful stapler for work to secure booklets with more pages than a standard stapler could handle (typically 25-30 pages). It good at that amount. Probably maxes out at 35 pages. 40 sheets (as advertised) is too much of a stretch as the staple going through the paper is clinging on underneath (when I bends back in on itself by a whisker- and that's IF you can get the staple through 40 sheets.