1、6 Point Socket Design: Expanding the contact surface between the socket and the fastener, increasing the locking force, reduces wear and prevents rounding off at corners. 2、High Quality Forging: Forged from heat treated chrome vanadium steel, each socket surface treated with corrosion resistant black phosphoric acid to prevent oil and rust. 3、Laser Marking: Each with the clear laser size marks, makes it quick and easy to select even in dim light. 4、Customized Storage Boxes: Each with a designated slot, so that the socket does not fall off easily. Sizes are also printed next to each card slot for easy identification. 5、Easy To Use: 15pcs sockets of different specifications to meet a variety of different needs and greatly improve work efficiency.