6-point socket design grips the flat sides of fasteners, not just the corners, preventing round-off in high torque applications, Extra-Teep broach accommodates longer fasteners, High-contrast permanent laser etched size markings are easy-to-read, even in low light, Made from forged and heat treated chrome vanadium steel with a corrosion-resistant black phosphate finish, Meets or exceeds ANSI performance standards.