A pair of longitudinally extending, {TAIL ~ symmetrical fingers} extends from the distal end of an elongated tubular inner member and are juxtaposed adjacent a window at {HEAD ~ the distal end} of an elongated tubular outer member 
A pair of longitudinally extending , { TAIL ~ symmetrical fingers } extends from the distal end of an elongated tubular inner member and are juxtaposed adjacent a window at { HEAD ~ the distal end } of an elongated tubular outer member
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH