The arm is made of 2x4 wood. It consists of two parts, the main arm plus a hinged weight support.
Measurements:
From pivot to end | 27" |
From pivot to weight hinge: | 16" |
From weight hinge to weight axle | 7" |
The main hinge is a pipe section with some short pieces of PVC pipe on it to keep the arm centered. The extra length makes good handles for moving it around.