Stanley Proto J6907MHF 1/4-Inch Drive Metric High Strength Magnetic Impact Socket, 7mm, 6 Point ProtoGrip Magnetic Sockets use high strength magnets made from a rare earth magnet alloy/nylon blend 1/4-inch Drive Metric High Strength Magnetic Impact Sockets - 6 Point Designed to easily pick up heavy fasteners and hold them tightly during use Precise 7mm Size 25/64-inch Nut end outside dia