The Milwaukee Shockwave Impact Duty Extractors are engineered with an optimized geometry to grip and remove the most demanding stuck， rounded over， rusted， painted on， stripped and damaged fasteners. Shockwave square socket adapter with up to 3X life for use in quick change impact drivers. The bits feature thick， hardened alloy steel for durability， color-coded rings for quick and easy size identification and a retention holder to keep them organized. The Shockwave Impact Duty accessory line is not only ideal for heavy duty impact applications， but delivers a full system solution for all drilling and fastening needs.