The HP Series of putters features five different head styles ranging from traditional to modern high-MOI designs. Every style incorporates a soft-feeling face insert. The insert contains micro-grooves that reduce skidding off the face.HP Series putters also include a jumbo grip. The grip helps prevent golfers' wrists from breaking down making it easier to create a pure and fluid putting stroke. In addition, the jumbo grip reduces grip pressure and minimizes club head rotation for a softer touch and more pure putting stroke.• Face insert with micro-grooves reduces skidding and provides a true roll to the cup• Jumbo grip minimizes wrist breakdown for a pure, fluid stroke• Classic putter head designs and high-MOI designs offer golfers more style options