This is the one-key system that locks the Mach2 into the hitch and the Add-ons together.
You can see the red safety latch that connects the Add-ons together and the blue push-button barrel lock that protects it from being removed.
The same lock and key are used to lock the rack into the hitch.
You will receive 2 keys with the Mach2 hitch rack. If you purchase more Add-ons later down the road, we can look up what variation of lock you already have and match it to your existing keys. Additional keys can also be purchased.
See it in action: