The VCORE SI 100 is designed with SPIN IMPULSE technology to maximize string movement resulting in an increase amount of spin and a very sharp bite to one's game. New BT Hybrid Stringing system features an enhanced grommet technology and string hole design allowing for increased main and cross string movement generating exceptional spin performance. Deeper grooves in the 3D Vector Shaft improve racquet stiffness and reduces twisting of the frame, increasing face stability by 20%. Black Micro Core technology features new carbon and elastic particles which have been added to specifically enhance and increase the face stability and improve vibration dampening. The VCORE Si 100 is the ideal frame for intermediate to advanced players looking for an excellent control and spin oriented frame in a more forgiving 100 square inch head size.