1/2 in. Drive SAE Shockwave Impact Duty Deep Well Socket Set (9-Piece)The 9 Piece Milwaukee Shockwave Impact Duty 1 2 in. 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