The Probst 51800146 PaverSQUARE PRO Folding Angle Form 48" x 48" x 68" is an aluminum folding angle form used in paving applications. Unfolding from 48" x 2" to a maximum size of 48" x 48" x 68", it creates an easy-to-use angle guide for a professional finish. Easy to fold and store, it's easy to store and transport while offering a generous maximum size once expanded.