The gripping knob is connected to {HEAD ~ an intermediate non deformable connecting device} having {TAIL ~ structure} to allow adjustment of the length thereof 
having
The gripping knob is connected to { HEAD ~ an intermediate non deformable connecting device } having { TAIL ~ structure } to allow adjustment of the length thereof
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH