The OD-4000 is an 11" (A4) open-ended punch that features the EZ operator changeable dies. With a punching paper capacity of 17 sheets of 20 lb. (80 gsm) bond and a very reasonable price, this punch makes manual punches obsolete. Dies are available in all of the standard hole patterns such as plastic comb, plastic spiral, Velobind®*, wire loop, square and round. With a full year's warranty, this is the BIG little punch at a bargain price.