An easy fix when your screw spacing is uncertain or inconsistent. One of the mounting holes on these lugs is actually a long slot, so your screws can be close or farther apart and they’ll still fit. Squeeze the barrel onto the wire with a compression tool for a permanent connection that stands up to heavy vibration, sudden shocks, and daily wear and tear. Compression lugs are a step up from set screw lugs when you need a physically strong connection, though set screw lugs attach to even larger wire.