The All-In Retro-Fit putter shaft can fit onto most standard putter shaft by simply cutting the original shaft and inserting the Retro Fit All-In aluminum tip into your existing shaft tip. Features: ACE- Aluminum Connector Enhanced Stability Technology permits the use of heavier putter heads High Tensile modulus carbon fiber Available in 100% all carbon fiber and carbon fiber/steel combination Precise Feel- feel is significantly improved through the use of proprietary nano tech and nanoalloy used in the prepreg matrix Optimum flex- Shaft stiffness is increased to minimize flexural distortion during the putting stroke for maximum accuracy and consistency Low torque- Advanced carbon fiber material increases shaft torsional stability to lessen effect of off-center hits, for enhanced distance control