Grooves disposed near the distal tip of the device are angled to open proximally and {HEAD ~ grooves} disposed near {TAIL ~ the proximal end} are angled to open distally 
disposed near
Grooves disposed near the distal tip of the device are angled to open proximally and { HEAD ~ grooves } disposed near { TAIL ~ the proximal end } are angled to open distally
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH