The R.A.T. Evo Focus Nut RAP020 from Robert Axle is a spare part for use on their thru-axle’s for Focus bikes. This nut is required for the dropouts on some Focus bike’s that use the R.A.T. system. Note this nut will only be compatible with a Robert Axle thru axle. And this nut comes with purchase of a R.A.T. replacement axle, so this is a spare part only. The nut is compatible with M12 x 1.5mm thread pitch axles from Robert Axle.