The hand knob is available for those who prefer to use something other than the standard crank handle, or where mini-blinds, sunshades, insect screens,etc. Will not allow the crank handle to be used. The hand knob is zinc die-cast, attaches with a set screw and is painted to match the operator. Part# 17cw42-1, white finish
Number. 5043972
Brand: AMESBURY TRUTH