Since rpm is an american company the make them for the associated size ballstuds.
so good on kyosho shaft ( turnbuckle ) but not on ballstud.
I might bee wrong but the associated ballstuds looks a bit smaller then the kyosho dito.
If you have kyosho ballstuds why dont use the UM-112 or the UM-112H wich are Harder . But then the color is wrong iŽll guess.
mvh Isobarik
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