The Cobra Amp Irons feature Cobraâ€TMs Advanced Material Placement, which utilizes a multi-alloy design to strategically position weight for optimal CG, promoting better launch in the long irons and more control in the short irons. Cobraâ€TMs E-9 Face Technology is at work in the Amp irons, making the sweetspot larger and your hits more consistent. The Amp irons also feature Cobraâ€TMs new V-skid sole design, which combines high-bounce factor with an optimal leading edge to improve turf-sole interaction for more consistent performance. 2nd Swing carries a great selection of new and used Cobra irons, including the Amp series. Get the best deal on your new Amp irons when you use 2nd Swingâ€TMs Trade-in Program where we give you a great value on your used golf clubs toward new purchases. For the full 2nd Swing Experience take advantage of our Free Club-fitting Service and have our expert fitters tailor your new clubs to your exact swing specs, service available both in-store and online.Cast -Amp irons are cast from 431 stainless steel and combined with a 17-4 steel face.Oversized -The Amp irons are slightly oversized to promote forgiveness.Slight Offset -These irons have slight offset for a draw-bias.