Proto J54205 Metric Socket 1/2 Dr. 6 Pt. 15 Piece SetFEATURES: This Proto 6 Point Metric Socket set is ideal for use on stubborn or damaged fasteners, and also on fasteners made from soft materials. The TorquePlus design is a high performance drive configuration which allows for quick and easy socket engagement to the fastener flats, not the corners. The TorquePlus configuration employs a radius corner design, shifting contact area and stress away from the fastener corners and distributing contact