The channel has an entrance opening in a direction radially of the end portion which is opposite the direction in which {HEAD ~ the handle portion} is angled from {TAIL ~ the end portion} 
The channel has an entrance opening in a direction radially of the end portion which is opposite the direction in which { HEAD ~ the handle portion } is angled from { TAIL ~ the end portion }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL