A boot 1, wherein the said end of {HEAD ~ the lever} is formed as {TAIL ~ a round ended lip} for engagement with said fixed seat 
A boot 1 , wherein the said end of { HEAD ~ the lever } is formed as { TAIL ~ a round ended lip } for engagement with said fixed seat
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH