NSTRUCTIONS 1 adjusting button,adjust the position of the blade position,after tighten the button 2 the image on a tough surface,design center,hold the setpoint,after flip adjusting handle,so finish minimize a around picture *This cutter is only suitable for reducing A4 paper, 135g paper, only appropriate for reducing paper *Not appropriate for reducing more than 250g thick and slippery tough products, sliding products, positioning discs are clean to slide, covered paper isn't always good, 3 for 25MM Button 4 for 37MM Button 5 for 44MM Button 7 for 58MM Button eight for 75MM Button Package include: 1pc*circle cutter