I just purchased these and they work great! The directions are a bit goofy but you can figure them out. You realy need the extender rod that holds the arms spread to the correct distance or it will drive you nuts getting them on. You can make one out of two different sizes of PVC pipe or conduit (slide one inside the other) drilling holes along the pipe and using a pin to hold in place. doesn't need to be fancy.
The do save your back!
Joe
