I use the nut with my Bosch cordless impact driver GDS 18 V-LI HT (max.650Nm) when Reifenumstecken and am very happy with it - with two ;-). On the inside of the nut you can see that the blue color is off - so what the function is therefore not affected and other wear and tear are not recognizable. Although the plastic covering is not clean, but it protects the alloy wheels from damage. Strong buy recommendation from me.