as far as i can see a few of my locking wheel nuts have had a hard life, and either they are a starge design or they have started to bend

i need to know what the best type to get is, best in terms of being unremoveable, and best in terms of grip between the key and the nut, as it getting annoyed with tyre irons, bending away as you try and do the nuts.

any recomendations guys?

links....or what set i need for a 1992 4x4 saff