No. 23/17mm Heavy Duty Staples provide a high quality, reliable solution for all your heavy duty stapling needs. Stapling up to 130 sheets of paper (80gsm), they are ideal for stapling tasks at home, in the office or at school. Designed for use with heavy duty staplers and tackers for accurate, trouble free stapling. Made from high quality steel and supplied in a pack of 1000 staples.