Riding book binding machine HQ404 1) High efficiency 2) Saves room 3) 3 - 4cbm for handle use Saddle stitching machineWith sensor protect of stitch head.Semi-auto binding,It is ideal post press equipment, could bind all kinds of print goods.periodicals, magazines, notebooks, school books, small capital, advertisement,instruciton book, manual book etc. Compatial for Hohner stitch head as well.