The Dual Action recoil pad combines two layers of Sorbothane. The first ultra-soft layer of Sorbothane reacts to absorb recoil fast for increased accuracy. The second layer dissipates energy and completes the maximum recoil absorption. Installation is easy, the same as it is for all KICK-EEZ Recoil Pads as there are no hollow spots or metal plates to worry about. According to independent testing, the Dual-Action Pad absorbed more energy than any other recoil pad on the market.