The device is operable by a single roofer, rather than requiring one person to distribute {HEAD ~ the plates} and {TAIL ~ another} to secure the plates in place 
The device is operable by a single roofer , rather than requiring one person to distribute { HEAD ~ the plates } and { TAIL ~ another } to secure the plates in place
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH