Lock em up
Simple install and they just work. Have had them in the past and it provides that bit of extra security when the storage units are full during travel.

Nice
Seems like a good product

Helmet locks
These are great. Pricy but simple to install and look good on the bike. Very happy with them. I'd like to talk to the designers about their location for the original helmet locks. Tucked in under the seat. Poor thinking on their part!

Quick helmet lock
easy to install. not complicated to use. Good for a quick secure lock.

handlebar helmet locks
They look good, feel solid and operate smoothly. These will make it really nice to safely and securely store our helmets so we wont have to carry them around.