Digital Three Knife Trimmer is a perfect solution for short-run bookbinding companies, automatically set by inputting the size data through the touchscreen, the books are automatically precisely aligned, first for book block front trimming, then head and tail trimming, the books can be pressed directly in the cutting area, the optical configuration is the dual head round corner trimmer, trim the book block's two corners simultaneously, driven by hydraulic, stable and cutting accuracy. This machine can operate both as a hand-fed, stand-alone machine and in inline mode.