A set of allen keys in 9 different sizes with an arm length of 180 mm, made from CV steel and nickel-plated with a base layer for levelling and smoothing, so that uniformity is achieved in recesses, through holes and cavities, without sharp edges forming, and so that they have very high resistance to wear. Suited to allen screws and ideal for everyday professional or household use. - Arm length: 180 mm. - Material: CV steel. - It includes: 1.5 / 2 / 2.5 /3 / 4 / 5 / 6 / 8 / 10 mm.