Spine Hinge Creaser MBO for MBO 35mm How to Create Perfect Bound Book Covers on Your Folding Machine The Spine & Hinge Creaser produces up to 4 simultaneous creases required for perfect bound book covers, and does it at folding machine speeds. Or handle any jobs requiring multiple scores in close proximity. Your customer will judge a book by it�s cover�make it perfect with the right crease! Eliminates fiber cracking regardless of grain direction Adjustable spine and hinge widths (5/32� min) Crease from same side or opposite sides of sheet in one pass Use for other creasing operations as well