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. 15 x Deep Impact Socket3 x Electric Drill Adapter1 x Black Storage Box Item Type: Drive Deep Impact Socket Set Material: CR V SteelColor: BlackApplication: Deep Impact Socket SetSurface Treatment: After corrosion resistant black phosphoric acid treatmentSocket System: MetricAdapter Format: InchSocket Size: Approx.10mm / 0.39in, 11mm / 0.43in, 12mm / 0.47in, 13mm / 0.51in, 14mm / 0.55in, 15mm / 0.59in, 16mm / 0.63in, 17mm / 0.67in, 18mm / 0.71in, 19mm / 0.75in, 20mm / 0.79in, 21mm / 0.83in, 22mm / 0.87in, 23mm / 0.91in, 24mm / 0.94inSocket Port Style: 6 point typeSocket Tail Style: Square notchInner Diameter of Socket Square Hole: 1/2inAdapter Length: 3in, 5in, 10inAdapter Square Hole Inner Diameter: 1/2in