Ultimate brand. 
Can be fitted or unlocked and removed in a few seconds making it the easiest to use.
Hardened steel construction.
Highly visible yellow and red finish.
Complete with 2 high security keys (unavailable as spares so look after them).
Fully adjustable for tyres up to 29cm wide.
Accepted by the majority of NZ insurance companies.  Your insurance company may require a proof of purchase in case of claim so keep your receipt.