blender bulldozer 2

create windshield wiper arm, add cylinder, select top circle,

shift + d to duplicate, e to extrude, select side faces, e to extrude, 

bevel cut the round faces, select face after cut

s to scale, e to extrude, s to scale, e to extrude

shift + d to duplicate, s to scale, e to extrude, ctrl + b to bevel

create wiper, add a plane, s to scale, e to extrude, s to scale

e to extrude, ctrl + b to bevel