The Roto Grip Idol Pro uses the Ikon core that changed the perception of the HP3 line for Roto Grip. This core has a low RG symmetrical shape with high differential that generates flare as well as awesome motion down the lane and on through the pin deck. The Idol Pro introduces the eTrax-S19 Solid Reactive coverstock which was designed to offer more traction on oil without reacting too early. This cover is finished with a 3000 grit Sheen. The solid coverstock with a sheen finish allows this ball to get through the front of the lane with a controlled reaction at the breakpoint on medium to medium/heavy oil conditions.