The BlueSpot Tools Long Arm Hexagon Key Set has been manufactured from chrome vanadium steel for increased durability. The keys have a black oxide coating to aid corrosion resistance. The extra length enables a greater amount of torque to be applied to the fastener. The tips are chamfered to enable access from a wider angle. Sizes: 1.27, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 8, 10mm