Teacher:In this task, you are to Translate German text to English
Teacher: Now, understand the problem? Solve this instance: Die Erfindung betrifft ein Maschinenstrickwerkzeug (11) und insbesondere eine Maschinenstricknadel (12) mit einem sich in Längsrichtung (L) erstreckenden Schaft (15).
Student:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
The invention relates to a machine knitting tool (11) and in particular a machine knitting needle (12) comprising a shaft (15) which extends in the longitudinal direction (L).