【MATERIAL】Made by heat Black chrome molybdenum steel, provides the strength and flexibility to handle high torque impact tools. Black phosphate finish for extra durability and anti-corrosion.
【RADIUSED CONERS DESIGN】Radiused corners inside drive avoid stress concentrations to causing possible cracking.
【SECURE CONNECTION】Spring-loaded retaining balls latch into sockets and hold them securely in place.
【MAKE IT EASY】 Use with impact wrenches and extends access to hard-to-reach fasteners in tight spots, suit for any industrial, mechanic, or construction and DIY work.