Adjust to A-frame extensions 90-degree or scaffold systemDual-pin hinge and Rock Locks for quick adjustmentsAerospace grade aluminum construction - 20% lighterWide-flared legs with Co-molded snap-on feetTip and glide wheelsA-frame height: 5.1 to 9.1 feetExtensions height: 11 to 19 feetExceeds all OSHA ANSI and CSA standardsWeight capacity of 300lbsANSI rating Type IA - Extra Heavy Duty Industrial