Disk-like metal or stone body for fixing a door leaf comprises a recess extending from the edge to the center of the disk

摘要

Disk-like metal or stone body (5) comprises a recess (2) extending from the edge to the center of the disk. Preferred Features: The recess is 20-70 mm wide with a depth of 20-100 mm. The metal or stone body consists of four parts which are screwed or adhered together. The recess tapers towards the center.