We have taken the guess work out of narrowing your own set of AR44 Rear Axle SHafts by machining them for you! These rear axle shafts (AX31408) are machined to the proper length and have the flats cut on them. All work is performed on a mill and not by hand like some others offer. These AR44 Rear Axle Shafts are shortened to work with our Narrowed SCX10 II / AR44 Beef Tubes.