SUPER STRONG HEAVY DUTY CONSTRUCTION- HOLDS UP TO 330 LBS: Step Stool Is Made From Super Strong, High Impact Polyethylene Construction For Long Lasting Durability That Can Effortlessly Hold Up To 330 Lbs. Will Not Collapse, Tip Over Or Wobble when Locked Properly In Place; when You Step On It Your Weight Presses Down Firmly, The Notches Stay In Place And Downwards Pressure Prevents The Walls From Caving In. Cheaper Imitations Can Crack Under Much Less Weight. All Weather Finish.