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