Punch for office use

摘要: A large punch for piercing a thick bundle of sheets paper at time. gear mechanism is operationally associated with handle to move vertically pair holding plates cooperating cylindrical blades provided on base, and thereby reduces the force required moving operation. base plate, which has holes each defining passage one blades, rotatably supported normally biased upwardly facilitate removal from after it been pierced. The are removably attached mechanism, respectively, so that both them can be easily changed new ones if required.