This kit includes WTO Switch Lug, adapter recoil lug, and pins necessary to convert your Kauger Arms action into a switch barrel gun. The WTO Switch Lug allows you to effortlessly change barrels without the need of an action wrench or removal from stock or chassis (dependent on size of barrel channel). The WTO Switch Lug, combined with the easy to swap bolt face system of Kauger Arms actions, allows you to swap between a large range of calibers with just one action and chassis system, whether you're on a work bench or in the field.