The extension 1 wherein a spirit level clamp includes {HEAD ~ at least one resiliently hinged clamping member} for bearing on {TAIL ~ a spirit levels} opposite face for clamping a spirit level in a spirit level extender 
for bearing on
The extension 1 wherein a spirit level clamp includes { HEAD ~ at least one resiliently hinged clamping member } for bearing on { TAIL ~ a spirit levels } opposite face for clamping a spirit level in a spirit level extender
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH