Unfortunately the Dorman part number does not have an R or L but does have alternative manufacturer numbers. The images in this listing are incorrect and show a right hand thread and R stamp on the end of the bolt, but it is a left hand thread. I have to return half of my order as I only have one wheel with left hand threaded studs so I will be keeping the kit for rebuilding this brake and ordering more studs part number 610-0152.10 to get the correct one. . However the quality of the cleats looks great and many others no longer make these cleats and not at this price point.