Heat treated chrome vanadium alloy steel drop forged body provides long life durability. Designed with a ball end to access socket cap screws with up to a 25-degree entry angle. Long Arm Hex Key Wrench Set offers the most common Inch and Metric hex wrench sizes to remove and install most socket cap screws found in cars, furniture, equipment, and more. The versatile long arm/short arm design offers extra reach on one end, and extra leverage on the other. Precisely-sized ends are chamfered to slide easily into fastener, reducing wear on the wrench and damage to fastener head. The unique hinged storage case opens flat, making it easier to get wrenches in and out. Specification: Material: Chrome Vanadium Steel Finish: Chrome Plated Standard: Metric H.R.C: 56-61 1. Type: Small Size: (Total Length) 1.5mm --- 80mm / 3.15" 2.0mm --- 85mm / 3.35" 2.5mm --- 93mm / 3.66" 3.0mm --- 102mm / 4.02" 4.0mm --- 114mm / 4.49" 5.0mm --- 127mm / 5.00" 6.0mm --- 146mm / 5.75" 8.0mm --- 160mm / 6.30" 10mm --- 177mm / 6.97" 2. Type: Large 1.5mm --- 98mm / 3.86" 2.0mm --- 107mm / 4.21" 2.5mm --- 117mm / 4.61" 3.0mm --- 128mm / 5.04" 4.0mm --- 143mm / 5.63" 5.0mm --- 160mm / 6.30" 6.0mm --- 176mm / 6.93" 8.0mm --- 200mm / 7.87" 10.0mm --- 226mm / 8.90" Package Content: 9 in 1 Hex Key