The SuperStroke Counter Core Weight is a threaded backweight for the SuperStroke 2.0 XL, 3.0 XL and Flatso 2.0 XL PLUS Series Grips. SuperStroke Plus Series Grips provide the ability to add back-weighting to any putter to achieve optimum balance. With a new proprietary threaded cap design, players can quickly and easily install a weight to instantly change feel and balance. A wrench is included.