Review on Enhanced Security Barbell Lock 1479DAT with Long 0.62" Shackle by Master Lock by Donnie King

Sure anti-theft device, probably not anti-theft device, easy to beat if you want. It has a shorter pin so measure your hitch/receiver to make sure it's long enough. When in doubt, go for the longer stainless steel version, use the exact same lock, just a longer stainless steel pin. You will also need some clearance to install the lock.