Cleaveland Tool's Edge Forming Tool
How to adjust and use the edge rolling tool.
http://www.cleavelandtool.com/Edge-Forming-Tool/productinfo/EF60/#.VftnqflViko
This is a tool that REALLY WORKS!
Roller shape forms a slightly turned edge on aluminum to assure a tight fit along the joints of overlapping sheets.
Hardened stainless rollers are attached to Vice-Grip handles.
Handle is at a comfortable-to-use angle.
Rollers are adjustable to the aluminum thickness and once set, can be locked to reproduce exact results.
Very controllable.
6 inch overall length
Bend reaches 0.2 inches from edge