Tour Edge TE 400 Complete Package Men's 12 Club Set Graphite Senior RH Type_Sunglasses INSERT SYSTEM The insert system Shaft:AO2 Blue 65 INSERT SYSTEM The insert system refers to the type of receptacle found on the sole of your golf shoes VIBRCOR is a high grade TPU strategically placed in the deep undercut pocket to create a new speed inducing and feel enhancing internal technology The TE 400 metalwoods are designed for the player seeking optimal launch and spin rates Power Lofted The lower and deeper Center of Gravity allowed the TE 400 irons to be power lofted for added distance and lower spin with the same launch characteristics as a standard lofted iron