Spring can wrench
In the process of working on my brakes I pulled the can springs back with the tool that is included with and attached to the can. It was a LONG job with an open end wrench. I started looking at options and found long extended sockets that were long enough to fit over the long spring can bolt/tool.
I wasn't crazy about that solution. Then I came up with the idea of a Gearwrench type wrench. The size I needed was 1 1/16". It was only $23.00 delivered. This thing is awesome for pulling those bolts back. Because you are intersecting the nut directly in line with it you don't have the wobbling forces you would with a long socket, nor the cost. Very fast and easy to use.