Discraft says this about the Soft Banger GT : Discraft Stability Rating: X-Line 1.0
Our first Groove Top? putter is the Banger-GT?, which is overstable enough to handle a headwind, and is also favored by players who putt on a hyzer. Won't turn over on long approaches. Tuck your thumb into the groove and feel the Groove Top? difference. The Soft version provides a grippier feel and more flexibility.
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