The shape and {TAIL ~ materials} of interior 16 may reflect and direct the sanitizing agent onto {HEAD ~ the doorknob} 
The shape and { TAIL ~ materials } of interior 16 may reflect and direct the sanitizing agent onto { HEAD ~ the doorknob }
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD