The Gravity Base is created with the same durability/functionality in mind as the EZ Shaping Racks. This base is made to be used in conjunction with the EZ Shaping Rack to give the customer the ability to set up the rack anywhere he/she pleases. No need to drill holes in the concrete just attach the rack to the Gravity Base with the provided hardware. The base is very well thought out with solid rubber feet to avoid slipping. It is extemely stable, yet the wide points of the legs (16") do not protrude in the shapers path. The base can be extended to a max of 55" to help accomodate extremely long shapes. For extra stability a sandbag can be placed on the top of the base. Made in the USA!