Cobra Amp Offset Driver (Women's) E9 Face Technology with Dual Roll has an elliptical face featuring a new canted bulge with dual roll design providing more distance to shots hit above and below the centerline AMP Speed Tuning: Each loft optimizes the amount of Dual Roll, head weight, shaft weight, grip weight and length differently to deliver the best performance for a given club head speed. Offset design reduces the effects of a slice by squaring the head more quickly through impact. A unique crown alignment feature helps players aim the driver on target