General Service Information: Symbols: Tools
The symbols denote that a specific measurement instrument or tool is recommended for the working procedure.
9. Use a Voltmeter
10. Use an Ammeter
11. Use an Ohmmeter
12. Use a pressure gauge, the value states the target value
13. Use a drill with the stated size
14. Use a hole saw with the stated size
15. Use an appropriate impact tool
16. Use a step drill, drill to the stated size