Slotline SL-781 Super Moment Golf Putter (34-Inch, Left Hand, Steel) 100% CNC Milled from a 2.4 pound block of solid 6061 aircraft grade Aluminum for 2.5 hours, for a soft feel at impact Tri-milled face reduces ball contact surface area providing true loft and flat face, getting the ball rolling faster to keep your putts on line Tungsten weighting to bring head to final weight and significantly increases MOI, increasing the sweet spot and improving accuracy Slot and Line alignment system insures proper alignment at address 90g of Tungsten used in the Heel and Toe