{TAIL ~ Features} on the blade cooperate with features on {HEAD ~ the collection chamber} to secure the blade to the collection chamber 
{ TAIL ~ Features } on the blade cooperate with features on { HEAD ~ the collection chamber } to secure the blade to the collection chamber
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH