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1.
A small screwdriver with a fine tip and having a pen clip attached, making it capable of being easily carried in a shirt pocket.

This word originated with US Air Force electronics technicians and is derived from the skill level digit of the Air Force Specialty Code (AFSC) (example: 30670) where "7" indicates an advanced technician. The idea being that this small screwdriver is used to make precision adjustments to circuit board components such as trim potentiameters that require a higher level of technical skill to perform.
The 15 hertz circuit on the TACAN is a little off. Could I borrow your 7-level to adjust it?
by Bill Gronos July 02, 2009
 
2.
A somewhat disparaging name for a more senior enlisted USAF technician who has advanced to the point where he only walks around checking the work of others. At times he will reach over your shoulder to make an insignificant tweak to the circuit you've been working on. Very annoying.
A1C Beek: "Did you see Sarge grilling the newbie?"
SRA Deedle: "I sure did. Since he made 7-level he really likes to ride the BEEPs."
by ex-99 October 26, 2011