https://www.hitchshops.com/i-8181562-trimax-locks-tr125-deluxe-1-2-in-key-receiver-lock.html
Trimax Locks TR125 Deluxe 1/2 in. Key Receiver Lock
TRIMAX DELUXE 1/2" Key Receiver Lock Fits All Class II Receiver Htiches
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https://www.mekosrl.it/accessori/tr125-manual
TR125 Manual 250
manual