Milwaukee Shockwave Impact Duty deep well sockets are engineered for extreme durability and up to 10 times the life. Made from proprietary steel and heat-treated to control hardness, the Shockwave Impact Duty sockets provide fastening capabilities with all impacts. Broadly targeting cordless users, the Shockwave Impact Duty accessory line is not only ideal for heavy-duty impact applications, but delivers a full system solution for all the user's drilling and fastening needs.