Discreet looking locking wheel bolts

[pugdamo 111 2 Cars]

Iv tried googling this to no avail but does anyone know if they make a locking wheel bolt that doesn't look like one? I'm not a fan of the way they look but obviously don't want my wheels stolen, i just wondered if someone made a 5 sided bolt or something so that from a glance it looked like a normal wheel bolt. 

 

Cheers

[MattCPR 2]

You can get some with 5 sided caps on, that might look ok.