Hilti PML 32 Operating Instructions Manual page 5

It is essential that the operating instructions are read
before the tool is operated for the first time.
Always keep these operating instructions together with
the tool.
Ensure that the operating instructions are with the tool
when it is given to other persons.
Component parts
1. Pendulum lockbutton
2. Selector button
3. LED indicator
4. Reference line
5. Pendulum
6. Mounting slot
7. Base section
1