OJL1251 Features: Four spring loaded casters on 2-step to 5-step models Casters retract when load is placed on the ladder, setting the ladder firmly in place on rubber tips When the load is removed, springs push down the casters enabling the ladder to move about freely Models 6-step and taller come equipped with a large 4'' swivel caster in front and rigid casters in the rear Stepping on bottom step activates the locking mechanism, locking rubber tipped feet in down position: To move the ladder, just step on the unlocking pedal Capacity Wt.: 350 lb [Max] Step/Rung Shape: Flat Material: Steel Type: Warehouse Ladder Price is for 1 Each Dimensions: The top platform on models 12-step and taller is surrounded on three sides by a 4'' high toeboard Step Depth: 7 in Platform Depth: 10 in