Lambo

Can anybody please help me. I've lost the security key to remove the security bolt from my alloy wheels. Does anybody know the bolt size, as I'd like to get replacements before I butcher the old ones off? 2001 (51 plate) Galaxy 1.9TDi Ghia. I've searched eBay and they seem to be M14 but with 1.5mm thread mine seem to be 1mm thread!! is this possible? Thanks in advance.