?Long Lasting Durability?Made from drop forged and heat treated chrome vanadium steel(50BV30) with a corrosion-resistant black phosphate finish which is resistant to corrosion and has a long service life. ?Detail Design?6-point flank drive design grips fastener more tightly on the flat sides prevents rounding off at corners, increases friction and is more slip resistant. ?Socket Size Marking?Highly visible laser-etched markings on corrosion-resistant black phosphate finish makes it easy to identify drive socket sizes, specs, and measurements for quick size selection when working. ?Heavy Duty Storage Case?Heavy duty plastic blow-molded carrying case for easy transport, simple storage, and quick organization. Sturdy and strong blow molded case features socket size labels for organized storage and is secured by two lever locks ?Complete Set?The complete set comes with the following pieces: 10mm 12mm 13mm 14mm 15mm 17mm 19mm 21mm 22mm 24mm