Midsize mallet style putter with two small vents cut into the back flange. Alignment benefits of RifleScope Technology (RST). The m3w is offset version. Toe hang 60 degrees down on m3, slightly less on the m3w, which is best for those who prefer offset small mallets. 100% milled stainless steel, with milled aluminum back cavity insert behind the face for enhanced feel and enlarged sweet spot. Platinum finish.