This is the ultimate trimmer for hardcore scrappers and card makers. It has both a rotary and guillotine trimmer on the same base. The cutting surface is 14-1/2 inch so that your 12 by 12 inch paper will lay flat when cutting. The guillotine safety features are great. The blade will not cut you if you touch grab or even chop your hand. Since this trimmer has a large blade it will cut up to 10 sheets of 24 pound paper at a time. You must hold down the active cutting guide to assure an accurate cut. No more putting pressure on the bar or blade.