# A B C D E F G H I J K L M N O P Q R S T U V W Y Z
Jackstaff
A tool used to check the vertical alignment of the stone spindle relative to the grinding face of the levelled BEDSTONE. It incorporates a QUILL for detecting faulty adjustment.
Alternative terms
| Term | Language | Region |
| Jack | English | |
| Jack Stick | English | |
| Quill Stick | English | |
| Stone Trail | English | |
| Tracer | English | |
| Tracer Bar | English | |
| Trail | English | |
| Tram Stick | English | |
| Tram-Staff | English | |
| Trammel | English |