The door checker also includes {HEAD ~ at least one slider} held within the housing that is in sliding contact with {TAIL ~ the second portion} of the arm inside of the housing 
The door checker also includes { HEAD ~ at least one slider } held within the housing that is in sliding contact with { TAIL ~ the second portion } of the arm inside of the housing
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH