The Precision Milled Blackline FM-01 from Nicklaus Golf comes with a mallet head, with a view to providing a high moment of inertia. The weight of the clubhead is also concentrated where the putter should strike the equator of the golf ball, to encourage a topspin roll, and the club also features an extended sight alignment line. The club is CNC precision milled and comes with soft urethane face insert to enhance feel.