Spot-Rite Level
A super handy toolbox tool!  Spot-Rite Level is a torpedo level and gunner nipple in one great little tool!
Threaded Magnetic Torpedo Level provides both a torpedo level and a gunner nipple.  Spot-Rite Level threads on to 1/2", 3/4", and 1" pipe to give you accurate readings.  
Spot-Rite Level.  Handly magnetic plumber's level

Spot Rite Level
This item has been discontinued by the manufacturer, and is no longer available.