LOKI RXTON I 40+ is a huge challenge with the combination of power and spin. The RXTON 1 rubber is made of a classic high density sponge with a pre-set bottom and long pull ball arc line. Premium medium viscosity rubber surface is mounted to increase the ability to create spin while still providing rapid ball lifting. The RXTON 1 has a high fault-tolerance rate, and is equipped with super strong performance stability especially suitable for hand 5-layer plywood, 7-layer plywood and fiberboard.