The Evnroll ER5 Centre Shafted Hatchback Putter is a winged mallet design with a “hatched out” centre section.SWEETFACEThe Evnroll ER5 Centre Shafted Hatchback Mallet utilises Evnroll's Patented SWEETFACE technology.Premise: On a 25-foot putt a ball hit ½” off centre, outside the Sweet Spot (centre of percussion), will travel 6” to 8” offline and 12” to 18” shorter. That miss-hit is a missed putt.How it works:Zero Dispersion - A series of closely spaced variable-width channels that are wider in the centre and get gradually narrower toward the heel and toe. This creates a precisely calibrated inward v-shape from both the heel and toe that progressively redirects the ball down the target line.Even Roll Distance - Because the channels get narrower away from the centre, the spacing gets wider. This increase in contact surface means more energy transfer and replaces the energy lost when a ball is hit away from the sweet spot. So centre and off-centre hits travel the same distance.Specifications:CNC Milled in Carlsbad, California USAHead Material: 303 stainless steelColour: Silver satin finishSwing Weight by Length:35″ - E234″ - D933″ - E1Face Loft: 2 degrees from the shaftLie Angle: 70 degreesGrip: Custom Evnroll White TourTac GripLength: Measured from centre of leading-edge to buttBalance: 10 degrees toe downShaft: FST stepless, .370” tipShafting: Straight shaft mounted over a hosel pin