The MILWAUKEE SHOCKWAVE Impact Duty Drive Sockets are engineered for extreme durability and provide up to 30X life. The impact driver socket adapters are made from a proprietary steel, heat treated for maximum strength and durability to control hardness. The impact socket has a thin wall construction for easy access in tight spaces. The SHOCKWAVE Impact Duty Socket Adapters feature 6-point deep wells for unyielding fastener engagement and are designed for use with impact wrenches in heavy-duty applications.