What is the bottom of the cart like? I can only see the top drawer and top of the cart.

This particular item is the optional locking drawer only, that is why the cart is not pictured in its entirety. This optional feature is available on carts manufactured by UMF Medical such as sku 6204 & sku 6214, which can be seen in the following link: https://www.universalmedicalinc.com/all-products/filing-storage/multi-purpose-carts.html?manufacturer=590