The Impact Cube is made of an ultra-durable Ballistic Nylon .Next, we added a variety of angles to provide a fantastic visual and feel of the different leans and positions you practice. It has 4 sides with 4 impact positions & it helps people see the impact angles and learn the correct impact feel. The Wedge Lean side is slanted so a forward leaning Wedge matches the angle. "There is a 7 iron lean and a vertical Driver lean side, too. There is also a round side." Flip the Impact Cube on its top and you have a side (the Wedge Lean) that is slanted toward you. Set the ball “under” the slant and it is the ideal tool for teaching an inside attack angle and preventing the “over the top” move.