| 释义 |
{{Double image|dreapta|Sammelband CHF edge view.jpg|300|Sachsenspiegel.jpg|160|Metal closure:
volume with alchemical treatises (tied in Strasbourg around 1568, collection of the Science History Institute, Philadelphia)|Leather closure:
Sachsenspiegel (hand written in 1385, Duisburg city library)}}A book clasp is a leather or metal element attached to the medieval and early modern book covers, used to protect the book from the penetration of dust and light. {{engineering-stub}} 3 : Fasteners|Books|Locksmithing |