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