Locking wheel nut

Does anyone know what size bolts are on the clio 197 cup, I need some locking wheel nuts on mine, have seen a set of black bolts I like but dunno what size I need to get

Thanks in advance
 
Want to find some black bolts for 197 cup as they chrome and had no locking nuts on so thought I try find all black bolts , and thanks tree200
 
Was wondering, when I got my 17mm sparco wheel spacers they also supplied the extra long wheel nuts but they don't have the cone, this means they sit lower in the alloy wheel. I asked and was told this is safe, any opinions? Ta
 

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