Am thinking its fully boarded with the use of the step you dont need to clip on when on a fully boarded lift with single hand rail. Althow i know pre scaff step it was -1 off full working lift so if it was 5 you had to have 4 if it was 4 it was 3 this was to clip on to ledgers but with the use of the step theres no need lol maby confused you more but fek it lol![]()