Arch Roller Specification For accurate arch modification pulling and rolling - the only solution is a professional arch roller! Tough and sturdy the roller bolts onto your hub and using it's wide range of adjustment gradually pulls and rolls your wings. From a simple lip roll to a complete flare this arch roller can do it all! Compatible with all 4 and 5 stud vehicles. To ensure that the product works perfectly for as long as possible the thread will need greasing before every use. Warning this fender roller is not suitable for M14 bolts / nuts.