This item number is specifically for exchange when purchasing a folding scaffold. THIS ITEM NUMBER IS FOR EXCHANGE ONLY. It allows you to upgrade from a platform on model 250 without a hatch (item no. 1002500) to a platform with a hatch (item no. 1002501). This exchange ensures that you get the desired functionality in your scaffold, making it easier to access different levels. Please note that this item number can only be used in conjunction with the purchase of a new folding scaffold.