The swing training device 20 can be sold with instructions that tell the golfer the proper size to adjust the length of {HEAD ~ the swing training device} for golfers of {TAIL ~ different sizes} 
The swing training device 20 can be sold with instructions that tell the golfer the proper size to adjust the length of { HEAD ~ the swing training device } for golfers of { TAIL ~ different sizes }
OTH 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 HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL