Tool 11 has bubble level 12 mounted in one end of {TAIL ~ the tool} 11 and {HEAD ~ a thumb screw} 8 mounted in the opposite end 
Tool 11 has bubble level 12 mounted in one end of { TAIL ~ the tool } 11 and { HEAD ~ a thumb screw } 8 mounted in the opposite end
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH