Spine Creaser Heidelberg ST100 for Heidelberg ST100/400 (Older Version) Please check the female shaft size as this indicates the size of the females and the correct matrix mould number. Old Version has a 10mm Shaft. New Version has a 17mm Shaft. Why should you try the Spine-Creaser? Totally eliminates fiber cracking 100% on cover stocks Totally eliminates ALL off line scoring for your saddle-stitched books Totally eliminates ALL outsourcing of creasing operation ....keep it all in your control! Saves your die cutters or printing presses fro more complex, profitable work Faster delivery to your customers!