•Drive end chamfer and four detents help provide quick positive engagement with drive tool on any of the socket drive walls. •Tight tolerances for snug fit on fastener. •Large clearance holes, concentric opening and nut end chamfer make it easy to position socket on fasteners. •Made from high strength steel to help minimize wall thickness and provide access to fasteners in recesses and where nuts and bolts protrude. •Impact sockets are used wherever powered drive tools are used to install or remove fasteners. •Impact sockets are designed to withstand the high torque and force associated with impact tools in repetitive application. •Use adapters to help increase or decrease drive end size. •Do not use hand adapters with power tools. •Do not overtorque small sockets when using them with adapters on large drive tools.