The m3 is a midsize mallet style putter with two small vents cut into the back flange. Alignment benefits of RifleScope Technology (RST). The m3 is medium toe hang. 100% milled 303 stainless steel, with milled aluminum back cavity insert behind the face for enhanced feel and enlarged sweet spot. This Private Reserve m3 maintains all of the original design elements but is further accented with a beautiful, yet durable, black nitride finish. The face has been double milled to TOUR Player specification creating the beautiful visual contrast of two tone metal.