Heavy duty stapler that can staple from 10 up to 90 sheets of standard weight paper at a time; include 1000 1/2" heavy-duty staples (Used for 50-90 sheets) With a built-in, front end jam clearing mechanism All-metal design for exceptional durability; non-slip base keeps stapler in ...Heavy duty stapler that can staple from 10 up to 90 sheets of standard weight paper at a time; include 1000 1/2" heavy-duty staples (Used for 50-90 sheets) With a built-in, front end jam clearing mechanism All-metal design for exceptional durability; non-slip base keeps stapler in place when leverage is applied Sliding, integrated graduation mechanism helps ensure accurate stapling placement Note: this stapler has to be used with heavy duty staples otherwise it will not work properly