This heavy-duty portable scaffold has a two-stage height adjustment from 28 in. to 48 in. Over 30 adjustments give you precise control to prevent strain while working at elevated heights. Four locking casters for safety and stability. Platform height adjusts from 28 in. to 48 in. Holds up to 900 lb. Heavy duty welded steel construction Comes with 28 in. W x 66-1.2 in. L wooden plank 30 height adjustments for exact positioning Built-in fittings for optional toe-boards or safety-rails Four locking swivel casters 5 in. diameter